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Quantum phase transition with a simple variational ansatz (2014)

Y. Lutsyshyn, G. E. Astrakharchik, C. Cazorla, and J. Boronat

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Y. Lutsyshyn, G. E. Astrakharchik, C. Cazorla, and J. Boronat We study the zero-temperature quantum phase transition between liquid and hcp solid 4 He. We use the variational method with a simple yet exchange-symmetric and fully explicit wave function. It is found that the optimized wave function undergoes spontaneous symmetry breaking and describes the quantum... [Phys. Rev. B 90, 214512] Published Thu Dec 11, 2014

Schlagwort(e): Superfluidity and superconductivity

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Thema: Physik

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Meissner and mesoscopic superconducting states in 1–4 unit-cell FeSe films (2014)

L. Z. Deng, B. Lv, Z. Wu, Y. Y. Xue, W. H. Zhang, F. S. Li, L. L. Wang, X. C. Ma, Q. K. Xue, and C. W. Chu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): L. Z. Deng, B. Lv, Z. Wu, Y. Y. Xue, W. H. Zhang, F. S. Li, L. L. Wang, X. C. Ma, Q. K. Xue, and C. W. Chu We report a detailed investigation on the superconductivity in eight 1–4 unit-cell (UC) FeSe films on SrTiO 3 substrates by measuring their magnetization and sheet resistance in a field between 5×10 −2 and 7×10 4 Oe over the last one and a half years as a function of temperature and frequency, from 2 t... [Phys. Rev. B 90, 214513] Published Thu Dec 11, 2014

Schlagwort(e): Superfluidity and superconductivity

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Markovian evolution of strongly coupled harmonic oscillators (2014)

Chaitanya Joshi, Patrik Öhberg, James D. Cresser, and Erika Andersson

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-12

Beschreibung: Author(s): Chaitanya Joshi, Patrik Öhberg, James D. Cresser, and Erika Andersson We investigate how to model Markovian evolution of coupled harmonic oscillators, each of them interacting with a local environment. When the coupling between the oscillators is weak, dissipation may be modeled using local Lindblad terms for each of the oscillators in the master equation, as is commo... [Phys. Rev. A 90, 063815] Published Thu Dec 11, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Propagation of nanofiber-guided light through an array of atoms (2014)

Fam Le Kien and A. Rauschenbeutel

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Fam Le Kien and A. Rauschenbeutel We study the propagation of nanofiber-guided light through an array of atomic cesium, taking into account the transitions between the hyperfine levels 6S 1/2 F=4 and 6P 3/2 F ′ =5 of the D 2 line. We derive the coupled-mode propagation equation, the input-output equation, the scattering matrix, the transfe... [Phys. Rev. A 90, 063816] Published Mon Dec 15, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Universal scaling of the critical temperature for thin films near the superconducting-to-insulating transition (2014)

Yachin Ivry, Chung-Soo Kim, Andrew E. Dane, Domenico De Fazio, Adam N. McCaughan, Kristen A. Sunter, Qingyuan Zhao, and Karl K. Berggren

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): Yachin Ivry, Chung-Soo Kim, Andrew E. Dane, Domenico De Fazio, Adam N. McCaughan, Kristen A. Sunter, Qingyuan Zhao, and Karl K. Berggren Thin superconducting films form a unique platform for geometrically confined, strongly interacting electrons. They allow an inherent competition between disorder and superconductivity, which in turn enables the intriguing superconducting-to-insulating transition and is believed to facilitate the com... [Phys. Rev. B 90, 214515] Published Mon Dec 15, 2014

Schlagwort(e): Superfluidity and superconductivity

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Topological defects in systems with two competing order parameters: Application to superconductors with charge- and spin-density waves (2014)

Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-17

Beschreibung: Author(s): Andreas Moor, Anatoly F. Volkov, and Konstantin B. Efetov On the basis of coupled Ginzburg-Landau equations we study nonhomogeneous states in systems with two order parameters (OPs). Superconductors with a superconducting OP Δ and a charge- or spin-density wave with amplitude W are examples of such systems. When one OP, say Δ, has a form of a topological d... [Phys. Rev. B 90, 224512] Published Tue Dec 16, 2014

Schlagwort(e): Superfluidity and superconductivity

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Comment on “Superconductivity in electron-doped layered TiNCl with variable interlayer coupling” (2014)

Dale R. Harshman and Anthony T. Fiory

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): Dale R. Harshman and Anthony T. Fiory In their article, Zhang et al. [Phys. Rev. B 86 , 024516 (2012)PRBMDO10.1103/PhysRevB.86.024516] present a remarkable result for Ax(S)yTiNCl compounds (α-phase TiNCl partially intercalated with alkali A and optionally co-intercalated molecular species S), finding the superconducting transition temper... [Phys. Rev. B 90, 186501] Published Thu Nov 06, 2014

Schlagwort(e): Superfluidity and superconductivity

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Reply to “Comment on ‘Superconductivity in electron-doped layered TiNCl with variable interlayer coupling' ” (2014)

S. Zhang, Masashi Tanaka, and Shoji Yamanaka

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-07

Beschreibung: Author(s): S. Zhang, Masashi Tanaka, and Shoji Yamanaka We have studied the electron-doped α-form TiNCl (FeOCl orthorhombic type) in detail and have found the transition temperature Tc of 18.0 K decreases monotonically with increasing the interlayer spacing d upon co-intercalation of various kinds of organic solvent molecules with alkali atoms. We conclu... [Phys. Rev. B 90, 186502] Published Thu Nov 06, 2014

Schlagwort(e): Superfluidity and superconductivity

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Pulling extremely anisotropic lossy particles using light without intensity gradient (2014)

Andrey Novitsky and Cheng-Wei Qiu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Andrey Novitsky and Cheng-Wei Qiu We study the effect of pulling optical force acting on a nonmagnetic anisotropic bead in electromagnetic fields without intensity gradient. Extreme anisotropy can be realized by a hyperbolic metamaterial made of metal-dielectric multilayers. We find that a passive anisotropic Rayleigh particle canno... [Phys. Rev. A 90, 053815] Published Fri Nov 07, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Majorana vortex-bound states in three-dimensional nodal noncentrosymmetric superconductors (2014)

Po-Yao Chang, Shunji Matsuura, Andreas P. Schnyder, and Shinsei Ryu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Po-Yao Chang, Shunji Matsuura, Andreas P. Schnyder, and Shinsei Ryu Noncentrosymmetric superconductors (NCSs), characterized by antisymmetric spin-orbit coupling and a mixture of spin-singlet and spin-triplet pairing components, are promising candidate materials for topological superconductivity. An important hallmark of topological superconductors is the existence ... [Phys. Rev. B 90, 174504] Published Fri Nov 07, 2014

Schlagwort(e): Superfluidity and superconductivity

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Fermi-surface reconstruction and transport coefficients from a mean-field bidirectional charge-density wave state in the high-Tc cuprates (2014)

Kangjun Seo and Sumanta Tewari

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Kangjun Seo and Sumanta Tewari The recent discovery of an incipient charge-density wave (CDW) instability competing with superconductivity in a class of high-temperature cuprate superconductors has brought the role of charge order in the phase diagram of the cuprates under renewed focus. Here, we take a mean field Q1=(2π/3,0) and... [Phys. Rev. B 90, 174503] Published Fri Nov 07, 2014

Schlagwort(e): Superfluidity and superconductivity

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Observation of pseudogaplike feature above Tc in LiFeAs by ultrafast optical spectroscopy (2014)

Kung-Hsuan Lin (林宮玄), Kuan-Jen Wang (王冠仁), Chung-Chieh Chang (張忠傑), Yu-Chieh Wen (溫昱傑), Dzung-Han Tsai (蔡宗翰), Yu-Ruei Wu (吳育叡), Yao-Tsung Hsieh (謝曜聰), Ming-Jye Wang (王明杰), Bing Lv (吕兵), Paul Ching-Wu Chu (朱經武), and Maw-Kuen Wu (吳茂昆)

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): Kung-Hsuan Lin (林宮玄), Kuan-Jen Wang (王冠仁), Chung-Chieh Chang (張忠傑), Yu-Chieh Wen (溫昱傑), Dzung-Han Tsai (蔡宗翰), Yu-Ruei Wu (吳育叡), Yao-Tsung Hsieh (謝曜聰), Ming-Jye Wang (王明杰), Bing Lv (吕兵), Paul Ching-Wu Chu (朱經武), and Maw-Kuen Wu (吳茂昆) We utilize ultrafast optical spectroscopy to study the quasiparticle relaxation in stoichiometric LiFeAs crystals. According to our temperature-dependent studies, we have observed three electronic phases in LiFeAs. Below the superconducting (SC) temperature Tc (=15 K), the relaxation time of quasipa... [Phys. Rev. B 90, 174502] Published Fri Nov 07, 2014

Schlagwort(e): Superfluidity and superconductivity

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Josephson junctions with tunable current-phase relation (2014)

A. Lipman, R. G. Mints, R. Kleiner, D. Koelle, and E. Goldobin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): A. Lipman, R. G. Mints, R. Kleiner, D. Koelle, and E. Goldobin We consider 0-π Josephson junctions consisting of 0 and π regions of lengths L0 and Lπ with critical current densities jc0 and jcπ, respectively. The dependence of the Josephson current on the phase-shift averaged along the junction is derived. We show that these systems exhibit the main features of... [Phys. Rev. B 90, 184502] Published Fri Nov 07, 2014

Schlagwort(e): Superfluidity and superconductivity

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Generation of harmonics via multiphoton resonant excitation of hydrogenlike ions in an x-ray free-electron-laser field (2014)

H. K. Avetissian, B. R. Avchyan, and G. F. Mkrtchian

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-08

Beschreibung: Author(s): H. K. Avetissian, B. R. Avchyan, and G. F. Mkrtchian The coherent radiation spectrum of highly charged hydrogenlike ions in an intense x-ray free-electron-laser field is considered. The spectrum corresponding to harmonic generation in the resonant multiphoton excitation regime is investigated both analytically and numerically, arising from the Dirac H... [Phys. Rev. A 90, 053812] Published Fri Nov 07, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Scattering resonances and bound states for strongly interacting Rydberg polaritons (2014)

P. Bienias, S. Choi, O. Firstenberg, M. F. Maghrebi, M. Gullans, M. D. Lukin, A. V. Gorshkov, and H. P. Büchler

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): P. Bienias, S. Choi, O. Firstenberg, M. F. Maghrebi, M. Gullans, M. D. Lukin, A. V. Gorshkov, and H. P. Büchler We provide a theoretical framework describing slow-light polaritons interacting via atomic Rydberg states. The method allows us to analytically derive the scattering properties of two polaritons. We identify parameter regimes where polariton-polariton interactions are repulsive. Furthermore, in the ... [Phys. Rev. A 90, 053804] Published Mon Nov 03, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Bloch bound states in the radiation continuum in a periodic array of dielectric rods (2014)

Evgeny N. Bulgakov and Almas F. Sadreev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): Evgeny N. Bulgakov and Almas F. Sadreev We consider an infinite periodic array of dielectric rods in vacuum with the aim to demonstrate three types of Bloch bound states in the continuum (BSCs): symmetry protected with a zero Bloch vector, embedded in one diffraction channel with nonzero Bloch vector, and embedded in two and three diffrac... [Phys. Rev. A 90, 053801] Published Mon Nov 03, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Single-photon modulation by the collective emission of an atomic chain (2014)

Zeyang Liao and M. Suhail Zubairy

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): Zeyang Liao and M. Suhail Zubairy We study the collective spontaneous emission of a linear atomic chain excited by a single photon. The interaction between the atoms and the common vacuum field can significantly change the eigenenergy and the spontaneous emission rate of the system. Due to the dipole-dipole interactions, the system ... [Phys. Rev. A 90, 053805] Published Mon Nov 03, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Enhanced self-diffusion of adsorbed methanol in silica aerogel (2014)

Jeongseop A. Lee, A. M. Mounce, Sangwon Oh, A. M. Zimmerman, and W. P. Halperin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-11-04

Beschreibung: Author(s): Jeongseop A. Lee, A. M. Mounce, Sangwon Oh, A. M. Zimmerman, and W. P. Halperin Nuclear magnetic resonance techniques are used to study anomalously high diffusion of methanol in porous silica aerogel. [Phys. Rev. B 90, 174501] Published Mon Nov 03, 2014

Schlagwort(e): Superfluidity and superconductivity

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Optomechanical Ramsey interferometry (2014)

Kenan Qu, Chunhua Dong, Hailin Wang, and G. S. Agarwal

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): Kenan Qu, Chunhua Dong, Hailin Wang, and G. S. Agarwal We adopt Ramsey's method of separated oscillatory fields to study coherences of the mechanical system in an optomechanical resonator. The high-resolution Ramsey fringes are observed in the emission optical field, when two pulses separated in time are applied. We develop a theory to describe the tran... [Phys. Rev. A 90, 053809] Published Wed Nov 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Cooperative effects and disorder: A scaling analysis of the spectrum of the effective atomic Hamiltonian (2014)

L. Bellando, A. Gero, E. Akkermans, and R. Kaiser

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-16

Beschreibung: Author(s): L. Bellando, A. Gero, E. Akkermans, and R. Kaiser We study numerically the spectrum of the non-Hermitian effective Hamiltonian that describes the dipolar interaction of a gas of N≫1 atoms with the radiation field. We analyze the interplay between cooperative effects and disorder for both scalar and vectorial radiation fields. We show that for dense... [Phys. Rev. A 90, 063822] Published Mon Dec 15, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quantum filtering of a thermal master equation with a purified reservoir (2014)

Marco G. Genoni, Stefano Mancini, Howard M. Wiseman, and Alessio Serafini

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-17

Beschreibung: Author(s): Marco G. Genoni, Stefano Mancini, Howard M. Wiseman, and Alessio Serafini We consider a system subject to a quantum optical master equation at finite temperature and study a class of conditional dynamics obtained by monitoring its totally or partially purified environment. More specifically, drawing from the notion that the thermal state of the environment may be regarded... [Phys. Rev. A 90, 063826] Published Tue Dec 16, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Stability of polarizable materials against superradiant phase transition (2014)

Motoaki Bamba and Tetsuo Ogawa

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-17

Beschreibung: Author(s): Motoaki Bamba and Tetsuo Ogawa The possibility of the superradiant phase transition in polarizable materials described by the minimal-coupling Hamiltonian with the longitudinal dipole-dipole interaction is examined. We try to reduce the Hamiltonian into the Dicke one in the homogeneous and infinite case, and discuss the stability... [Phys. Rev. A 90, 063825] Published Tue Dec 16, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Filtering of matter symmetry properties by circularly polarized nonlinear optics (2014)

Julien Duboisset, Hervé Rigneault, and Sophie Brasselet

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-18

Beschreibung: Author(s): Julien Duboisset, Hervé Rigneault, and Sophie Brasselet We propose a direct readout of symmetry information in matter using nonlinear optics. From combinations of circularly and longitudinally polarized optical fields, we construct irreducible spherical field tensors for second- and third-order nonlinear processes. The coupling of these field tensors to ... [Phys. Rev. A 90, 063827] Published Wed Dec 17, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Pressure-enhanced superconductivity in Eu_{3}Bi_{2}S_{4}F_{4} (2014)

Yongkang Luo, Hui-Fei Zhai, Pan Zhang, Zhu-An Xu, Guang-Han Cao, and J. D. Thompson

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-18

Beschreibung: Author(s): Yongkang Luo, Hui-Fei Zhai, Pan Zhang, Zhu-An Xu, Guang-Han Cao, and J. D. Thompson The pressure effect on the newly discovered charge-transferred BiS 2 -based superconductor, Eu 3 Bi 2 S 4 F 4 , with a T c of 1.5 K at ambient pressure, is investigated by transport and magnetic measurements. Accompanied with the enhancement of metallicity under pressures, the onset superconducting transition ... [Phys. Rev. B 90, 220510] Published Wed Dec 17, 2014

Schlagwort(e): Superfluidity and superconductivity

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Superradiance and collective gain in multimode optomechanics (2014)

T. Kipf and G. S. Agarwal

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): T. Kipf and G. S. Agarwal We present a description of a strongly driven multimode optomechanical system that shows the emergence of cooperative effects usually known from systems of atom-light interaction. Our calculations show that under application of a coherent pump field the system's response can be switched from a super... [Phys. Rev. A 90, 053808] Published Wed Nov 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quantum manifestation of a synchronization transition in optomechanical systems (2014)

Lei Ying, Ying-Cheng Lai, and Celso Grebogi

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-11-06

Beschreibung: Author(s): Lei Ying, Ying-Cheng Lai, and Celso Grebogi Recent years have witnessed significant interest in nanoscale physical systems, such as nanoelectromechanical and optomechanical systems, which can exhibit distinct collective dynamical behaviors, such as synchronization. As a parameter of the system changes, transition from one type of emerging col... [Phys. Rev. A 90, 053810] Published Wed Nov 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Three-dimensional atom localization by laser fields in a four-level tripod system (2014)

Vladimir S. Ivanov, Yuri V. Rozhdestvensky, and Kalle-Antti Suominen

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-02

Beschreibung: Author(s): Vladimir S. Ivanov, Yuri V. Rozhdestvensky, and Kalle-Antti Suominen We present a scheme for high-precision three-dimensional (3D) localization by the measurement of the atomic-level population. The scheme is applied to a four-level tripod-type atom coupled by three strong standing waves and a probe running wave. As a result, the atom can be localized in volumes that... [Phys. Rev. A 90, 063802] Published Mon Dec 01, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Unified position-dependent photon-number quantization in layered structures (2014)

Mikko Partanen, Teppo Häyrynen, Jani Oksanen, and Jukka Tulkki

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-02

Beschreibung: Author(s): Mikko Partanen, Teppo Häyrynen, Jani Oksanen, and Jukka Tulkki We have recently developed a position-dependent quantization scheme for describing the ladder and effective photon-number operators associated with the electric field to analyze quantum optical energy transfer in lossy and dispersive dielectrics [Phys. Rev. A 89 , 033831 (2014)PLRAAN10.1103/PhysRevA.... [Phys. Rev. A 90, 063804] Published Mon Dec 01, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Fast, all-optical logic gates and transistor functionalities using a room-temperature atomic controlled Kerr gate (2014)

R. B. Li, L. Deng, and E. W. Hagley

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-12-03

Beschreibung: Author(s): R. B. Li, L. Deng, and E. W. Hagley We demonstrate all-optical multilogic gate operations and transistor functionalities using a Kerr phase gate method in a room-temperature 85 Rb vapor. Two symmetric Mach-Zehnder interferometers are constructed in the same vapor cell in which a Raman gain medium is established. We show three basic log... [Phys. Rev. A 90, 063806] Published Tue Dec 02, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Internal static electric and magnetic field at the copper cite in a single crystal of the electron-doped high-T_{c} superconductor Pr_{1.85}Ce_{0.15}CuO_{4−y} (2014)

Guoqing Wu, F. Zamborszky, A. P. Reyes, P. L. Kuhns, R. L. Greene, and W. G. Clark

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-05

Beschreibung: Author(s): Guoqing Wu, F. Zamborszky, A. P. Reyes, P. L. Kuhns, R. L. Greene, and W. G. Clark We report 63,65 Cu-NMR spectroscopy and Knight shift measurements on a single crystal of the electron-doped high-T c superconductor Pr 1.85 Ce 0.15 CuO 4−y with an applied magnetic field (H) up to 26.42 T. A very small NQR frequency is obtained with the observation of the spectrum, which shows an extremely... [Phys. Rev. B 90, 214506] Published Thu Dec 04, 2014

Schlagwort(e): Superfluidity and superconductivity

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Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates (2014)

M. P. M. Dean, A. J. A. James, A. C. Walters, V. Bisogni, I. Jarrige, M. Hücker, E. Giannini, M. Fujita, J. Pelliciari, Y. B. Huang, R. M. Konik, T. Schmitt, and J. P. Hill

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-12-05

Beschreibung: Author(s): M. P. M. Dean, A. J. A. James, A. C. Walters, V. Bisogni, I. Jarrige, M. Hücker, E. Giannini, M. Fujita, J. Pelliciari, Y. B. Huang, R. M. Konik, T. Schmitt, and J. P. Hill The cuprate high temperature superconductors exhibit a pronounced trend in which the superconducting transition temperature T c increases with the number of CuO 2 planes n in the crystal structure. We compare the magnetic excitation spectrum of Bi 2+x Sr 2−x CuO 6+δ (Bi-2201) and Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ (Bi-2223... [Phys. Rev. B 90, 220506] Published Thu Dec 04, 2014

Schlagwort(e): Superfluidity and superconductivity

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Transition linewidth of cross correlations in random intensity fluctuations in electromagnetically induced transparency (2014)

Lei Feng, Pengxiong Li, Mengzhen Zhang, Tun Wang, and Yanhong Xiao

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): Lei Feng, Pengxiong Li, Mengzhen Zhang, Tun Wang, and Yanhong Xiao It is known that cross correlation between the random intensity fluctuations of two lasers forming electromagnetically induced transparency (EIT) exhibits a transition from correlation to anticorrelation. We study the linewidth behavior of this transition and have found the linewidth is below the (e... [Phys. Rev. A 89, 013815] Published Tue Jan 14, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Unconventional sign-changing superconductivity near quantum criticality in YFe2Ge2 (2014)

Alaska Subedi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): Alaska Subedi I present the results of first principles calculations of the electronic structure and magnetic interactions for the recently discovered superconductor YFe2Ge2 and use them to identify the possible nature of superconductivity and quantum criticality in this compound. I find that the Fe 3d derived st... [Phys. Rev. B 89, 024504] Published Tue Jan 14, 2014

Schlagwort(e): Superfluidity and superconductivity

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Localization of charge carriers in the normal state of underdoped Bi2+xSr2−xCuO6+δ (2014)

Huiqian Luo and Hai-Hu Wen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-15

Beschreibung: Author(s): Huiqian Luo and Hai-Hu Wen We report the transport results of underdoped Bi2+xSr2−xCuO6+δ (0.05≤x≤0.40) single crystals. A close relationship between the upturn of in-plane resistivity [ρab(T)] and the sign of magnetoresistance in the normal state upon Bi substitutions is found. Combining the results of the field and angular ... [Phys. Rev. B 89, 024506] Published Tue Jan 14, 2014

Schlagwort(e): Superfluidity and superconductivity

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Observation of lock-in phenomena in heavy-ion-irradiated single crystal of Ba(Fe0.93Co0.07)2As2 (2014)

Toshihiro Taen, Hidenori Yagyuda, Yasuyuki Nakajima, Tsuyoshi Tamegai, Oscar Ayala-Valenzuela, Leonardo Civale, Boris Maiorov, Tadashi Kambara, and Yasuyuki Kanai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): Toshihiro Taen, Hidenori Yagyuda, Yasuyuki Nakajima, Tsuyoshi Tamegai, Oscar Ayala-Valenzuela, Leonardo Civale, Boris Maiorov, Tadashi Kambara, and Yasuyuki Kanai The angular dependence of magnetization was measured in an optimally Co-doped BaFe2As2 single crystal, which is irradiated by 2.6 GeV uranium to introduce columnar defects (CDs). At low fields (H), we observe the irreversible magnetization Mirr insensitive to the angle θ around H∥CDs. The field depe... [Phys. Rev. B 89, 024508] Published Wed Jan 22, 2014

Schlagwort(e): Superfluidity and superconductivity

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Shape resonances and shell effects in thin-film multiband superconductors (2014)

Aurelio Romero-Bermúdez and Antonio M. García-García

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): Aurelio Romero-Bermúdez and Antonio M. García-García We study analytically the evolution of superconductivity in clean quasi-two-dimensional multiband superconductors as the film thickness enters the nanoscale region by mean-field and semiclassical techniques. Tunneling into the substrate and finite lateral size effects, which are important in experim... [Phys. Rev. B 89, 024510] Published Wed Jan 22, 2014

Schlagwort(e): Superfluidity and superconductivity

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Superconductivity in LiFeO2Fe2Se2 with anti-PbO-type spacer layers (2014)

X. F. Lu, N. Z. Wang, G. H. Zhang, X. G. Luo, Z. M. Ma, B. Lei, F. Q. Huang, and X. H. Chen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): X. F. Lu, N. Z. Wang, G. H. Zhang, X. G. Luo, Z. M. Ma, B. Lei, F. Q. Huang, and X. H. Chen We report on a superconductor LiFeO2Fe2Se2 with Tc∼43 K, synthesized via the hydrothermal method. The anti-PbO-type spacer layer of LiFeO2 has been successfully intercalated between the anti-PbO-type FeSe layer, which results in a high-Tc superconductivity in this iron selenide material. In this mat... [Phys. Rev. B 89, 020507] Published Wed Jan 22, 2014

Schlagwort(e): Superfluidity and superconductivity

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Orbital-selective superconductivity, gap anisotropy, and spin resonance excitations in a multiorbital t-J1-J2 model for iron pnictides (2014)

Rong Yu, Jian-Xin Zhu, and Qimiao Si

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): Rong Yu, Jian-Xin Zhu, and Qimiao Si We study the orbital-selective superconducting pairing in a five-orbital t-J1-J2 model for iron pnictides. Depending on the orbital selectivity of electron correlations and the orbital characters along the Fermi surface, the superconducting gap in an A1g pairing state may exhibit anisotropy. This an... [Phys. Rev. B 89, 024509] Published Wed Jan 22, 2014

Schlagwort(e): Superfluidity and superconductivity

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Matter correlations induced by coupling to quantum light (2014)

Frank Schlawin and Shaul Mukamel

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-24

Beschreibung: Author(s): Frank Schlawin and Shaul Mukamel Correlations between uncoupled particles induced by the interaction with different types of light are investigated using a superoperator formalism. We derive compact expressions for the doubly-excited-state distributions of noninteracting multilevel atoms excited by classical laser light, classical ... [Phys. Rev. A 89, 013830] Published Thu Jan 23, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quasidark state and quantum interference in the Jaynes-Cummings model with a common bath (2014)

Zhihai Wang and D. L. Zhou

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): Zhihai Wang and D. L. Zhou Within the capacity of current experiments, we design a composite atom-cavity system with a common bath, in which the decay channels of the atom and the cavity mode interfere with each other. When the direct atom-cavity coupling is absent, the system can be trapped in a quasidark state (the coherent... [Phys. Rev. A 89, 013809] Published Mon Jan 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Controlling a whispering-gallery-doublet-mode avoided frequency crossing: Strong coupling between photon bosonic and spin degrees of freedom (2014)

Maxim Goryachev, Warrick G. Farr, Daniel L. Creedon, and Michael E. Tobar

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): Maxim Goryachev, Warrick G. Farr, Daniel L. Creedon, and Michael E. Tobar A combination of electron spin interactions in a magnetic field allows us to control the resonance frequencies of a high-Q whispering-gallery (WG) cavity mode doublet, resulting in precise measurements of an avoided crossing between the two modes comprising the doublet. We show that the resonant pho... [Phys. Rev. A 89, 013810] Published Mon Jan 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Nonlocal gap solitons in PT-symmetric periodic potentials with defocusing nonlinearity (2014)

Chandroth P. Jisha, Alessandro Alberucci, Valeriy A. Brazhnyi, and Gaetano Assanto

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): Chandroth P. Jisha, Alessandro Alberucci, Valeriy A. Brazhnyi, and Gaetano Assanto Existence and stability of PT-symmetric gap solitons in a periodic structure with defocusing nonlocal nonlinearity are studied both theoretically and numerically. We find that, for any degree of nonlocality, gap solitons are always unstable in the presence of an imaginary potential. The instability ... [Phys. Rev. A 89, 013812] Published Mon Jan 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Transient lasing without inversion via forbidden and virtual transitions (2014)

Luqi Yuan, Dawei Wang, Anatoly A. Svidzinsky, Hui Xia, Olga Kocharovskaya, Alexei Sokolov, George R. Welch, Szymon Suckewer, and Marlan O. Scully

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): Luqi Yuan, Dawei Wang, Anatoly A. Svidzinsky, Hui Xia, Olga Kocharovskaya, Alexei Sokolov, George R. Welch, Szymon Suckewer, and Marlan O. Scully Lasing without inversion (LWI) in the extreme-ultraviolet (XUV) has been the focus of recent research of our Princeton/Texas group. Because of the restriction imposed on the decay rates associated with the usual LWI schemes, it is difficult to transfer the physics gleaned from previous experiments t... [Phys. Rev. A 89, 013814] Published Mon Jan 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Storage and retrieval of squeezing in multimode resonant quantum memories (2014)

K. Tikhonov, K. Samburskaya, T. Golubeva, and Yu. Golubev

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-14

Beschreibung: Author(s): K. Tikhonov, K. Samburskaya, T. Golubeva, and Yu. Golubev In this article the ability to record, store, and read out the quantum properties of light is studied. The discussion is based on high-speed and adiabatic models of quantum memory in λ configuration and in the limit of strong resonance. We show that in this case the equality between efficiency and s... [Phys. Rev. A 89, 013811] Published Mon Jan 13, 2014

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Symmetry of the charge density wave in cuprates (2014)

Ashot Melikyan and M. R. Norman

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-17

Beschreibung: Author(s): Ashot Melikyan and M. R. Norman We derive and analyze an effective Ginzburg-Landau (GL) functional for a charge density wave for a model of electrons on a tight-binding square lattice with density-density interactions. We show, using realistic electronic dispersions for the cuprates, that for the simplest GL theory, the preferred ... [Phys. Rev. B 89, 024507] Published Thu Jan 16, 2014

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Perfect squeezing by damping modulation in circuit quantum electrodynamics (2014)

Nicolas Didier, Farzad Qassemi, and Alexandre Blais

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-18

Beschreibung: Author(s): Nicolas Didier, Farzad Qassemi, and Alexandre Blais Dissipation-driven quantum state engineering uses the environment to steer the state of quantum systems and preserve quantum coherence in the steady state. We show that modulating the damping rate of a microwave resonator generates a vacuum squeezed state of arbitrary squeezing strength, thereby con... [Phys. Rev. A 89, 013820] Published Fri Jan 17, 2014

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Tunable negative permeability in a quantum plasmonic metamaterial (2014)

K. R. McEnery, M. S. Tame, S. A. Maier, and M. S. Kim

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): K. R. McEnery, M. S. Tame, S. A. Maier, and M. S. Kim We consider the integration of quantum emitters into a negative permeability metamaterial design in order to introduce tunability as well as nonlinear behavior. The unit cell of our metamaterial is a ring of metamolecules, each consisting of a metal nanoparticle and a two-level semiconductor quantum... [Phys. Rev. A 89, 013822] Published Tue Jan 21, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Supercontinuum generation in both frequency and wavenumber domains in nonlinear waveguide arrays (2014)

Truong X. Tran, Dũng C. Duong, and Fabio Biancalana

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Truong X. Tran, Dũng C. Duong, and Fabio Biancalana We study the spatiotemporal effects in waveguide arrays with Kerr and Raman nonlinearities when a short pulse is launched into the system where both dispersive and diffractive resonant radiations can be simultaneously emitted by solitons. We show that it is possible to generate and control the super... [Phys. Rev. A 89, 013826] Published Tue Jan 21, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Optical pressure deduced from energy relations within relativistic formulations of electrodynamics (2014)

Cheyenne J. Sheppard and Brandon A. Kemp

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Cheyenne J. Sheppard and Brandon A. Kemp The analysis of plane waves normally incident upon moving media yields a velocity-dependent net flow of electromagnetic energy within the system such that optical pressures are deduced. Two common formulations (Chu and Minkowski) are employed to model the phenomena with respect to the Abraham-Minkow... [Phys. Rev. A 89, 013825] Published Tue Jan 21, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Evidence for a charge collective mode associated with superconductivity in copper oxides from neutron and x-ray scattering measurements of La2−xSrxCuO4 (2014)

S. R. Park, T. Fukuda, A. Hamann, D. Lamago, L. Pintschovius, M. Fujita, K. Yamada, and D. Reznik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): S. R. Park, T. Fukuda, A. Hamann, D. Lamago, L. Pintschovius, M. Fujita, K. Yamada, and D. Reznik In superconducting copper oxides, some Cu-O bond-stretching phonons around 70 meV show anomalous giant softening and broadening of electronic origin, and electronic dispersions have large renormalization kinks near the same energy. These observations suggest that phonon broadening originates from qu... [Phys. Rev. B 89, 020506] Published Tue Jan 21, 2014

Schlagwort(e): Superfluidity and superconductivity

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Optical control of an atomic inner-shell x-ray laser (2014)

Gábor Darvasi, Christoph H. Keitel, and Christian Buth

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-22

Beschreibung: Author(s): Gábor Darvasi, Christoph H. Keitel, and Christian Buth X-ray free-electron lasers have had an enormous impact on x-ray science by achieving femtosecond pulses with unprecedented intensities. However, present-day facilities operating by the self-amplified spontaneous emission principle have a number of shortcomings; namely, their radiation has a chaotic ... [Phys. Rev. A 89, 013823] Published Tue Jan 21, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Odd-parity superconductivity in Weyl semimetals (2014)

Huazhou Wei, Sung-Po Chao, and Vivek Aji

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): Huazhou Wei, Sung-Po Chao, and Vivek Aji Unconventional superconducting states of matter are realized in the presence of strong spin-orbit coupling. In particular, nondegenerate bands can support odd-parity superconductivity with rich topological content. Here we study whether this is the case for Weyl semimetals. These are systems whose l... [Phys. Rev. B 89, 014506] Published Fri Jan 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Spontaneous PT-symmetry breaking in complex frequency band structures (2014)

Vassilios Yannopapas

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): Vassilios Yannopapas We demonstrate that the process of band-gap creation in periodic solids such as atomic, photonic, or phononic crystals can be viewed as spontaneous PT-symmetry breaking in the framework of a complex frequency band structure. This allows the use of ordinary artificial structures such as Bragg stacks ... [Phys. Rev. A 89, 013808] Published Fri Jan 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Superconducting proximity effect in silicene: Spin-valley-polarized Andreev reflection, nonlocal transport, and supercurrent (2014)

Jacob Linder and Takehito Yokoyama

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-11

Beschreibung: Author(s): Jacob Linder and Takehito Yokoyama We theoretically study the superconducting proximity effect in silicene, which features massive Dirac fermions with a tunable mass (band gap), and compute the conductance across a normal-superconductor (N-S) silicene junction, the nonlocal conductance of an N-S-N junction, and the supercurrent flowi... [Phys. Rev. B 89, 020504] Published Fri Jan 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Diffractionless image propagation and frequency conversion via four-wave mixing exploiting the thermal motion of atoms (2014)

Lida Zhang (张理达) and Jörg Evers

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-16

Beschreibung: Author(s): Lida Zhang (张理达) and Jörg Evers A setup to frequency-convert an arbitrary image encoded in the spatial profile of a probe field onto a signal field using four-wave mixing in a thermal atom vapor is proposed. The atomic motion is exploited to cancel diffraction of both signal and probe fields simultaneously. We show that an incoher... [Phys. Rev. A 89, 013817] Published Wed Jan 15, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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High-energy laser-pulse self-compression in short gas-filled fibers (2014)

P. N. Anderson, P. Horak, J. G. Frey, and W. S. Brocklesby

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-17

Beschreibung: Author(s): P. N. Anderson, P. Horak, J. G. Frey, and W. S. Brocklesby We examine the spatiotemporal compression of energetic femtosecond laser pules within short gas-filled fibers. The study is undertaken using an advanced nonlinear pulse propagation model based on a multimode generalized nonlinear Schrödinger equation that has been modified to include plasma effects.... [Phys. Rev. A 89, 013819] Published Thu Jan 16, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Heat capacity jump at Tc and pressure derivatives of superconducting transition temperature in the Ba1−xNaxFe2As2 (0.1≤x≤0.9) series (2014)

Sergey L. Bud'ko, Duck Young Chung, Daniel Bugaris, Helmut Claus, Mercouri G. Kanatzidis, and Paul C. Canfield

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-17

Beschreibung: Author(s): Sergey L. Bud'ko, Duck Young Chung, Daniel Bugaris, Helmut Claus, Mercouri G. Kanatzidis, and Paul C. Canfield We present the evolution of the initial (up to ∼10 kbar) hydrostatic pressure dependencies of Tc and of the ambient pressure, and the jump in the heat capacity associated with the superconducting transition as a function of Na doping in the Ba1−xNaxFe2As2 family of iron-based superconductors. For Na... [Phys. Rev. B 89, 014510] Published Thu Jan 16, 2014

Schlagwort(e): Superfluidity and superconductivity

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Spin-density waves and the superconductivity dome in heavy electron systems with nested Fermi surfaces (2014)

P. Schlottmann

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-18

Beschreibung: Author(s): P. Schlottmann The nesting of the Fermi surfaces of an electron and a hole pocket separated by a nesting vector Q and the interaction between electrons give rise to itinerant antiferromagnetism. The order can gradually be suppressed by mismatching the nesting and a quantum critical point is obtained as the Néel te... [Phys. Rev. B 89, 014511] Published Fri Jan 17, 2014

Schlagwort(e): Superfluidity and superconductivity

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Tunable higher-order sideband spectra in a waveguide-coupled photonic crystal molecule beyond the weak-excitation approximation (2014)

Jiahua Li, Rong Yu, and Ying Wu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): Jiahua Li, Rong Yu, and Ying Wu We investigate light transmission obtained from a hybrid optical system composed of a pair of directly coupled photonic crystal cavities called a photonic crystal molecule, a single semiconductor quantum dot, and a waveguide beyond the weak-excitation approximation. We take account of nonlinear term... [Phys. Rev. A 89, 015802] Published Wed Jan 22, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Deflection of nematicon-vortex vector solitons in liquid crystals (2014)

Gaetano Assanto, Antonmaria A. Minzoni, and Noel F. Smyth

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-01-23

Beschreibung: Author(s): Gaetano Assanto, Antonmaria A. Minzoni, and Noel F. Smyth The deflection of a vector soliton formed by a solitary wave and an optical vortex in nematic liquid crystals is investigated upon interaction with a localized refractive index defect. The azimuthal instability of the vortex can be triggered by the index perturbation and enhanced by the distortion o... [Phys. Rev. A 89, 013827] Published Wed Jan 22, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Spin superfluidity in coplanar multiferroics (2014)

Wei Chen and Manfred Sigrist

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-01-24

Beschreibung: Author(s): Wei Chen and Manfred Sigrist Multiferroics with coplanar magnetic order are discussed in terms of a superfluid condensate, with special emphasis on spin supercurrents created by phase gradients of the condensate and the effect of external electric fields. By drawing the analogy to a superconducting condensate, phenomena such as... [Phys. Rev. B 89, 024511] Published Thu Jan 23, 2014

Schlagwort(e): Superfluidity and superconductivity

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Phase-space interference of states optically truncated by quantum scissors: Generation of distinct superpositions of qudit coherent states by displacement of vacuum (2014)

Adam Miranowicz, Małgorzata Paprzycka, Anirban Pathak, and Franco Nori

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Adam Miranowicz, Małgorzata Paprzycka, Anirban Pathak, and Franco Nori Conventional Glauber coherent states (CS) can be defined in several equivalent ways, e.g., by displacing the vacuum or, explicitly, by their infinite Poissonian expansion in Fock states. It is well known that these definitions become inequivalent if applied to finite d-level systems (qudits). We pre... [Phys. Rev. A 89, 033812] Published Mon Mar 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Beam focusing in reflections from flat subwavelength diffraction gratings (2014)

Y. C. Cheng, J. Redondo, and K. Staliunas

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Y. C. Cheng, J. Redondo, and K. Staliunas We predict that narrow beams, reflecting from flat subwavelength diffraction gratings, can focus. The effect is shown for the beams of electromagnetic radiation; however, it should be observable for beams of waves of arbitrary nature (microwaves, surface plasmons, and acoustic and mechanical waves).... [Phys. Rev. A 89, 033814] Published Mon Mar 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Experimental investigation of high-frequency-difference twin beams in hot cesium atoms (2014)

Miaojun Guo, Haitao Zhou, Dan Wang, Jiangrui Gao, Junxiang Zhang, and Shiyao Zhu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Miaojun Guo, Haitao Zhou, Dan Wang, Jiangrui Gao, Junxiang Zhang, and Shiyao Zhu We experimentally investigate the quantum-correlated twin beams generated through stimulated nondegenerate four-wave mixing in the double-lambda atomic system. A 2.5-dB noise reduction of intensity difference with 18.4-GHz frequency difference at the cesium D1 line is observed in a Cs vapor cell. Th... [Phys. Rev. A 89, 033813] Published Mon Mar 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Polarization-entanglement generation and control in a counterpropagating phase-matching geometry (2014)

G. Boucher, A. Eckstein, A. Orieux, I. Favero, G. Leo, T. Coudreau, A. Keller, P. Milman, and S. Ducci

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): G. Boucher, A. Eckstein, A. Orieux, I. Favero, G. Leo, T. Coudreau, A. Keller, P. Milman, and S. Ducci We present a theoretical model to describe polarization-entanglement generation by spontaneous parametric down conversion in a transverse pump configuration. It takes into account the effect of a resonant microcavity for the pump beam and gives a direct link between the level of generated entangleme... [Phys. Rev. A 89, 033815] Published Mon Mar 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Parabolic-symmetry vector optical fields and their tightly focusing properties (2014)

Yue Pan (潘岳), Yongnan Li (李勇男), Zhi-Cheng Ren (任志成), Yu Si (司宇), Chenghou Tu (涂成厚), and Hui-Tian Wang (王慧田)

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Yue Pan (潘岳), Yongnan Li (李勇男), Zhi-Cheng Ren (任志成), Yu Si (司宇), Chenghou Tu (涂成厚), and Hui-Tian Wang (王慧田) We present theoretically and generate experimentally a vector optical field with parabolic symmetry of linear polarization. We extend the study to the modified parabolic-symmetry vector fields. We explore their tightly focusing behaviors, in particular, a modified parabolic-symmetry vector field can... [Phys. Rev. A 89, 035801] Published Mon Mar 10, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Cooper-pair-based photon entanglement without isolated emitters (2014)

Alex Hayat, Hae-Young Kee, Kenneth S. Burch, and Aephraim M. Steinberg

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Alex Hayat, Hae-Young Kee, Kenneth S. Burch, and Aephraim M. Steinberg We show that the recombination of Cooper pairs in semiconductors can be used as a natural source of polarization-entangled photons, making use of the inherent angular momentum entanglement in the superconducting state. Our proposal is not based on opposite spin population of discrete energy levels a... [Phys. Rev. B 89, 094508] Published Mon Mar 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Magnetic flux density and the critical field in the intermediate state of type-I superconductors (2014)

V. Kozhevnikov, R. J. Wijngaarden, J. de Wit, and C. Van Haesendonck

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): V. Kozhevnikov, R. J. Wijngaarden, J. de Wit, and C. Van Haesendonck To address unsolved fundamental problems of the intermediate state (IS), the equilibrium magnetic flux structure and the critical field in a high-purity type-I superconductor (indium film) are investigated using magneto-optical imaging with a three-dimensional vector magnet and electrical transport ... [Phys. Rev. B 89, 100503] Published Mon Mar 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Tunneling spectroscopy of superconducting nanospheres (2014)

Miroslav Hopjan and Pavel Lipavský

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): Miroslav Hopjan and Pavel Lipavský Energy spectra of superconducting nanospheres observed via tunneling spectroscopy are theoretically discussed. In the energy gap we find small peaks which correspond to the two-particle dynamics beyond the mean-field BCS approximation. These peaks promise to be a sensitive test of theories of superc... [Phys. Rev. B 89, 094507] Published Mon Mar 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Investigations of the superconducting states of noncentrosymmetric LaPdSi3 and LaPtSi3 (2014)

M. Smidman, A. D. Hillier, D. T. Adroja, M. R. Lees, V. K. Anand, R. P. Singh, R. I. Smith, D. M. Paul, and G. Balakrishnan

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-11

Beschreibung: Author(s): M. Smidman, A. D. Hillier, D. T. Adroja, M. R. Lees, V. K. Anand, R. P. Singh, R. I. Smith, D. M. Paul, and G. Balakrishnan The noncentrosymmetric superconductors LaPdSi3 and LaPtSi3 have been studied with magnetization, specific-heat, resistivity, and μSR measurements. These crystallize in the tetragonal BaNiSn3 structure and superconductivity is observed at Tc=2.65(5) K for LaPdSi3 and Tc=1.52(6) K for LaPtSi3. The res... [Phys. Rev. B 89, 094509] Published Mon Mar 10, 2014

Schlagwort(e): Superfluidity and superconductivity

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Generation of isolated asymmetric umbilics in light's polarization (2014)

Enrique J. Galvez, Brett L. Rojec, Vijay Kumar, and Nirmal K. Viswanathan

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-13

Beschreibung: Author(s): Enrique J. Galvez, Brett L. Rojec, Vijay Kumar, and Nirmal K. Viswanathan Polarization-singularity C points, a form of line singularities, are the vectorial counterparts of the optical vortices of spatial modes and fundamental optical features of polarization-spatial modes. Their generation in tailored beams has been limited to so-called “lemon” and “star” C points that c... [Phys. Rev. A 89, 031801] Published Wed Mar 12, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Three-photon electromagnetically induced absorption in a ladder-type atomic system (2014)

Han Seb Moon and Taek Jeong

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-13

Beschreibung: Author(s): Han Seb Moon and Taek Jeong We report on three-photon electromagnetically induced absorption (TPEIA) due to three-photon coherence in ladder-type atomic systems for the 5S1/2-5P3/2-5D5/2 transition in 87Rb atoms. When a counterpropagating coupling field was added to the typical ladder-type electromagnetically induced transpare... [Phys. Rev. A 89, 033822] Published Wed Mar 12, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quasi-phase-matching of high-order harmonics in multiple plasma jets (2014)

R. A. Ganeev, M. Suzuki, and H. Kuroda

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-13

Beschreibung: Author(s): R. A. Ganeev, M. Suzuki, and H. Kuroda Harmonic generation of laser radiation from ionized particles in the extreme ultraviolet range at the conditions of the phase matching between the femtosecond driving field and harmonics is an advanced concept for the development of efficient coherent sources in this spectral region. Here we present... [Phys. Rev. A 89, 033821] Published Wed Mar 12, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Coherence creation in an optically thick medium by matched propagation of a chirped-laser-pulse pair (2014)

N. Sandor, G. Demeter, D. Dzsotjan, and G. P. Djotyan

American Physical Society (APS)

In: Physical Review A

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Beschreibung: Author(s): N. Sandor, G. Demeter, D. Dzsotjan, and G. P. Djotyan We consider the simultaneous propagation of a pair of Raman-resonant, frequency-modulated (chirped) laser pulses in an optically thick medium, modeled by an ensemble of Λ atoms. A self-organization (“matching”) effect is shown for the chirped-pulse pair, which leads to a quasilossless propagation. F... [Phys. Rev. A 89, 033823] Published Wed Mar 12, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Double magnetic resonance and spin anisotropy in Fe-based superconductors due to static and fluctuating antiferromagnetic orders (2014)

Weicheng Lv, Adriana Moreo, and Elbio Dagotto

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-13

Beschreibung: Author(s): Weicheng Lv, Adriana Moreo, and Elbio Dagotto Motivated by recent neutron scattering experiments in Fe-based superconductors, we study how the magnetic resonance in the superconducting state is affected by the simultaneous presence of either static or fluctuating magnetic orders using the random phase approximation. We find that for the underdo... [Phys. Rev. B 89, 104510] Published Wed Mar 12, 2014

Schlagwort(e): Superfluidity and superconductivity

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Structural, magnetic, and superconducting properties of pulsed-laser-deposition-grown La1.85Sr0.15CuO4/La2/3Ca1/3MnO3 superlattices on (001)-oriented LaSrAlO4 substrates (2014)

S. Das, K. Sen, I. Marozau, M. A. Uribe-Laverde, N. Biskup, M. Varela, Y. Khaydukov, O. Soltwedel, T. Keller, M. Döbeli, C. W. Schneider, and C. Bernhard

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-13

Beschreibung: Author(s): S. Das, K. Sen, I. Marozau, M. A. Uribe-Laverde, N. Biskup, M. Varela, Y. Khaydukov, O. Soltwedel, T. Keller, M. Döbeli, C. W. Schneider, and C. Bernhard Epitaxial La1.85Sr0.15CuO4/La2/3Ca1/3MnO3 (LSCO/LCMO) superlattices on (001)-oriented LaSrAlO4 substrates have been grown with pulsed laser deposition technique. Their structural, magnetic, and superconducting properties have been determined with in situ reflection high-energy electron diffraction, ... [Phys. Rev. B 89, 094511] Published Wed Mar 12, 2014

Schlagwort(e): Superfluidity and superconductivity

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Optical control of χ3-frequency conversion by the second-order modulation instability (2014)

Michael Kues, Maximilian Brinkmann, and Carsten Fallnich

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): Michael Kues, Maximilian Brinkmann, and Carsten Fallnich A numerical study showing the excitation and control of second-order modulation instability (MI) dynamics in nonlinear optical fibers via two optical seed fields located under the MI gain spectrum is presented. The phase dependence of the two weak input seed fields on the temporal and spectral secon... [Phys. Rev. A 89, 033824] Published Thu Mar 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Photon emission via vacuum-dressed intermediate states under ultrastrong coupling (2014)

Jin-Feng Huang (黄金凤) and C. K. Law

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): Jin-Feng Huang (黄金凤) and C. K. Law We investigate theoretically quantum effects of a cavity-atom system in which the upper two levels of a cascade-type three-level atom interact with a cavity field mode in the ultrastrong-coupling regime. By exploiting the virtual photons carried by atom-cavity dressed states, we indicate how two ext... [Phys. Rev. A 89, 033827] Published Thu Mar 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Dissipation signatures of the normal and superfluid phases in torsion pendulum experiments with He3 in aerogel (2014)

N. Zhelev, R. G. Bennett, E. N. Smith, J. Pollanen, W. P. Halperin, and J. M. Parpia

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): N. Zhelev, R. G. Bennett, E. N. Smith, J. Pollanen, W. P. Halperin, and J. M. Parpia We present data for the energy dissipation factor Q−1 over a broad temperature range at various pressures of a torsion pendulum setup used to study He3 confined in a 98% open silica aerogel. Values for Q−1 above Tc are temperature independent and have weak pressure dependence. Below Tc, a deliberate... [Phys. Rev. B 89, 094513] Published Thu Mar 13, 2014

Schlagwort(e): Superfluidity and superconductivity

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Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies (2014)

Peiwen Gao, Rong Yu, Liling Sun, Hangdong Wang, Zhen Wang, Qi Wu, Minghu Fang, Genfu Chen, Jing Guo, Chao Zhang, Dachun Gu, Huanfang Tian, Jianqi Li, Jing Liu, Yanchun Li, Xiaodong Li, Sheng Jiang, Ke Yang, Aiguo Li, Qimiao Si, and Zhongxian Zhao

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): Peiwen Gao, Rong Yu, Liling Sun, Hangdong Wang, Zhen Wang, Qi Wu, Minghu Fang, Genfu Chen, Jing Guo, Chao Zhang, Dachun Gu, Huanfang Tian, Jianqi Li, Jing Liu, Yanchun Li, Xiaodong Li, Sheng Jiang, Ke Yang, Aiguo Li, Qimiao Si, and Zhongxian Zhao There is considerable interest in uncovering the physics of iron-based superconductivity from the alkaline iron selenides, a materials class containing an insulating phase (245 phase) and a superconducting (SC) phase. Due to the microstructural complexity of these superconductors, the role of the 24... [Phys. Rev. B 89, 094514] Published Thu Mar 13, 2014

Schlagwort(e): Superfluidity and superconductivity

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Interpreting a nested Mach-Zehnder interferometer with classical optics (2014)

Pablo L. Saldanha

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): Pablo L. Saldanha In an recent work with the title “Asking Photons Where They Have Been,” Danan et al. experimentally demonstrate an intriguing behavior of photons in an interferometer [Phys. Rev. Lett. 111, 240402 (2013)]. In their words: “The photons tell us that they have been in the parts of the interferometer th... [Phys. Rev. A 89, 033825] Published Thu Mar 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Entanglement modes and topological phase transitions in superconductors (2014)

T. P. Oliveira and P. D. Sacramento

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): T. P. Oliveira and P. D. Sacramento Topological insulators and topological superconductors display various topological phases that are characterized by different Chern numbers or by gapless edge states. In this work we show that various quantum information methods such as the von Neumann entropy, entanglement spectrum, fidelity, and f... [Phys. Rev. B 89, 094512] Published Thu Mar 13, 2014

Schlagwort(e): Superfluidity and superconductivity

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Quantum-mechanical analogy and supersymmetry of electromagnetic wave modes in planar waveguides (2014)

H. P. Laba and V. M. Tkachuk

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): H. P. Laba and V. M. Tkachuk We study an analog of the equations describing transverse electric (TE) and transverse magnetic (TM) modes in a planar waveguide with an arbitrary continuous dependence of the electric permittivity and magnetic permeability on coordinates with the stationary Schrödinger equation. The effective poten... [Phys. Rev. A 89, 033826] Published Thu Mar 13, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Unfolding the electronic structure of Ca10(Fe1−xPtxAs)10(PtnAs8) (2014)

Tom Berlijn

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-14

Beschreibung: Author(s): Tom Berlijn The iron platinum arsenides Ca10(Fe1−xPtxAs)10(PtnAs8) are the first Fe-based superconductors with metallic spacer layers. Furthermore they display a large variation in their critical temperatures depending on the amount of Pt in their spacer layers: (n=3,4). To gain more insight into the role of th... [Phys. Rev. B 89, 104511] Published Thu Mar 13, 2014

Schlagwort(e): Superfluidity and superconductivity

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Pairing symmetry, phase diagram, and edge modes in the topological Fulde-Ferrell-Larkin-Ovchinnikov phase (2014)

Chun Fai Chan and Ming Gong

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): Chun Fai Chan and Ming Gong The realizations of spin-orbit coupling in cold atoms lead to a burst of research activities in the searching of topological matters in ultracold atom systems. Recent theoretical predictions show that topological Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superfluids can be realized with appropriate sp... [Phys. Rev. B 89, 174501] Published Mon May 05, 2014

Schlagwort(e): Superfluidity and superconductivity

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Low-energy excitations of a one-dimensional Bose gas with weak contact repulsion (2014)

M. Pustilnik and K. A. Matveev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-21

Beschreibung: Author(s): M. Pustilnik and K. A. Matveev We study elementary excitations of a system of one-dimensional bosons with weak contact repulsion. We show that the Gross-Pitaevskii regime, in which the excitations are the well-known Bogoliubov quasiparticles and dark solitons, does not extend to the low-energy limit. Instead, the spectra of both ... [Phys. Rev. B 89, 100504] Published Thu Mar 20, 2014

Schlagwort(e): Superfluidity and superconductivity

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Unconventional photon blockade in doubly resonant microcavities with second-order nonlinearity (2014)

Dario Gerace and Vincenzo Savona

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-21

Beschreibung: Author(s): Dario Gerace and Vincenzo Savona It is shown that noncentrosymmetric materials with bulk second-order nonlinear susceptibility can be used to generate strongly antibunched radiation at an arbitrary wavelength, solely determined by the resonant behavior of suitably engineered coupled microcavities. The proposed scheme exploits the u... [Phys. Rev. A 89, 031803] Published Thu Mar 20, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Casimir forces on atoms in optical cavities (2014)

Álvaro M. Alhambra, Achim Kempf, and Eduardo Martín-Martínez

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-21

Beschreibung: Author(s): Álvaro M. Alhambra, Achim Kempf, and Eduardo Martín-Martínez Casimir-type forces, such as those between two neutral conducting plates, or between a sphere, atom, or molecule and a plate, have been widely studied and are becoming of increasing significance, for example, in nanotechnology. A key challenge is to better understand, from a fundamental microscopic ... [Phys. Rev. A 89, 033835] Published Thu Mar 20, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Multiple half-quantum vortices in rotating superfluid 3He (2014)

Mikio Nakahara and Tetsuo Ohmi

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-21

Beschreibung: Author(s): Mikio Nakahara and Tetsuo Ohmi Half-quantum vortices and ordinary vortices in a rotating thin-film superfluid 3He under a strong magnetic field are considered. It is shown that 2n+1 half-quantum vortices interpolate between n singular vortices and n+1 singular vortices as the angular velocity is changed when the external magnetic... [Phys. Rev. B 89, 104515] Published Thu Mar 20, 2014

Schlagwort(e): Superfluidity and superconductivity

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Phase-dependent interference fringes in the wavelength scaling of harmonic efficiency (2014)

I. Yavuz, E. A. Bleda, Z. Altun, and T. Topcu

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): I. Yavuz, E. A. Bleda, Z. Altun, and T. Topcu We describe phase-dependent wavelength scaling of high-order-harmonic generation efficiency driven by ultrashort laser fields in the midinfrared. We employ both numerical solution of the time-dependent Schrödinger equation and the strong field approximation to analyze the fine-scale oscillations in ... [Phys. Rev. A 89, 055801] Published Mon May 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Topology of the planar phase of superfluid He3 and bulk-boundary correspondence for three-dimensional topological superconductors (2014)

Yuriy Makhlin, Mikhail Silaev, and G. E. Volovik

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): Yuriy Makhlin, Mikhail Silaev, and G. E. Volovik We provide topological classification of possible phases with the symmetry of the planar phase of superfluid He3. Compared to the B phase [class DIII in classification of A. Altland and M. R. Zirnbauer, Phys. Rev. B 55, 1142 (1997)], it has an additional symmetry, which modifies the topology. We ana... [Phys. Rev. B 89, 174502] Published Mon May 05, 2014

Schlagwort(e): Superfluidity and superconductivity

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Raman conversion in intense femtosecond Bessel beams in air (2014)

Maik Scheller, Xi Chen, Gombojav O. Ariunbold, Norman Born, Jerome Moloney, Miroslav Kolesik, and Pavel Polynkin

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): Maik Scheller, Xi Chen, Gombojav O. Ariunbold, Norman Born, Jerome Moloney, Miroslav Kolesik, and Pavel Polynkin We demonstrate experimentally that bright and nearly collimated radiation can be efficiently generated in air pumped by an intense femtosecond Bessel beam. We show that this nonlinear conversion process is driven by the rotational Raman response of air molecules. Under optimum conditions, the conver... [Phys. Rev. A 89, 053805] Published Mon May 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Quantum correlations among optical and vibrational quanta (2014)

Sergiu Carlig and Mihai A. Macovei

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): Sergiu Carlig and Mihai A. Macovei We investigate the feasibility of correlating an optical cavity field and a vibrational phonon mode. A laser pumped quantum dot fixed on a nanomechanical resonator beam interacts as a whole with the optical resonator mode. When the quantum dot variables are faster than the optical and phonon ones, w... [Phys. Rev. A 89, 053803] Published Mon May 05, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

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Fast-light enhancement of an optical cavity by polarization mode coupling (2014)

David D. Smith, H. Chang, Krishna Myneni, and A. T. Rosenberger

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-05-06

Beschreibung: Author(s): David D. Smith, H. Chang, Krishna Myneni, and A. T. Rosenberger We present an entirely linear all-optical method of cavity scale factor enhancement that relies on mode coupling between the orthogonal polarization modes of a single optical cavity, eliminating the necessity of using an atomic medium to produce the required anomalous dispersion, which decreases the... [Phys. Rev. A 89, 053804] Published Mon May 05, 2014

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Concept of a reflective power limiter based on nonlinear localized modes (2014)

Eleana Makri, Hamidreza Ramezani, Tsampikos Kottos, and Ilya Vitebskiy

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-20

Beschreibung: Author(s): Eleana Makri, Hamidreza Ramezani, Tsampikos Kottos, and Ilya Vitebskiy Optical limiters are designed to transmit low-intensity light, while blocking the light with excessively high intensity. A typical passive limiter absorbs excessive electromagnetic energy, which can cause its overheating and destruction. We propose the concept of a photonic reflective limiter based ... [Phys. Rev. A 89, 031802] Published Wed Mar 19, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Nonlinear optomechanical pressure (2014)

Claudio Conti and Robert Boyd

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-03-20

Beschreibung: Author(s): Claudio Conti and Robert Boyd A transparent material exhibits ultrafast optical nonlinearity and is subject to optical pressure if irradiated by a laser beam. However, the effect of nonlinearity on optical pressure is often overlooked, even if a nonlinear optical pressure may be potentially employed in many applications, such as... [Phys. Rev. A 89, 033834] Published Wed Mar 19, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Effect of magnetic field on the photon detection in thin superconducting meander structures (2014)

R. Lusche, A. Semenov, Y. Korneeva, A. Trifonov, A. Korneev, G. Gol'tsman, and H.-W. Hübers

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-20

Beschreibung: Author(s): R. Lusche, A. Semenov, Y. Korneeva, A. Trifonov, A. Korneev, G. Gol'tsman, and H.-W. Hübers We have studied the influence of an externally applied magnetic field on the photon and dark count rates of meander-type niobium nitride superconducting nanowire single-photon detectors. Measurements have been performed at a temperature of 4.2 K, and magnetic fields up to 250 mT have been applied pe... [Phys. Rev. B 89, 104513] Published Wed Mar 19, 2014

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Suppression of geometric barrier in type-II superconducting strips (2014)

R. Willa, V. B. Geshkenbein, and G. Blatter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2014-03-20

Beschreibung: Author(s): R. Willa, V. B. Geshkenbein, and G. Blatter We study the magnetic response of a superconducting double strip, i.e., two parallel coplanar thin strips of width 2w, thickness d≪w, and infinite length, separated by a gap of width 2s and subject to a perpendicular magnetic field H. The magnetic properties of this system are governed by the presen... [Phys. Rev. B 89, 104514] Published Wed Mar 19, 2014

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Condensation of photons coupled to a Dicke field in an optical microcavity (2014)

Eran Sela, Achim Rosch, and Victor Fleurov

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-05-01

Beschreibung: Author(s): Eran Sela, Achim Rosch, and Victor Fleurov Motivated by recent experiments reporting Bose-Einstein condensation of light coupled to incoherent dye molecules in a microcavity, we show that due to a dimensionality mismatch between the two-dimensional cavity photons and the three-dimensional arrangement of molecules, the system permits superflu... [Phys. Rev. A 89, 043844] Published Wed Apr 30, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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Hidden Markov model of atomic quantum jump dynamics in an optically probed cavity (2014)

S. Gammelmark, K. Mølmer, W. Alt, T. Kampschulte, and D. Meschede

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2014-04-25

Beschreibung: Author(s): S. Gammelmark, K. Mølmer, W. Alt, T. Kampschulte, and D. Meschede We analyze the quantum jumps of an atom interacting with a cavity field, where strong coupling makes the cavity transmission depend on the time-dependent atomic state. In our analysis we employ a Bayesian approach that conditions the population of the atomic states at time t on the cavity transmissi... [Phys. Rev. A 89, 043839] Published Thu Apr 24, 2014

Schlagwort(e): Quantum optics, physics of lasers, nonlinear optics, classical optics

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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