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Nonlocal transport via edge states in InAs/GaSb coupled quantum wells (2015)

Susanne Mueller, Atindra Nath Pal, Matija Karalic, Thomas Tschirky, Christophe Charpentier, Werner Wegscheider, Klaus Ensslin, and Thomas Ihn

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Susanne Mueller, Atindra Nath Pal, Matija Karalic, Thomas Tschirky, Christophe Charpentier, Werner Wegscheider, Klaus Ensslin, and Thomas Ihn We have investigated low-temperature electronic transport on InAs/GaSb double quantum wells, a system which promises to be electrically tunable from a normal to a topological insulator. Hall bars of 50 μ m in length down to a few micrometers gradually develop a pronounced resistance plateau near charg… [Phys. Rev. B 92, 081303(R)] Published Mon Aug 10, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

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Confinement of spin-orbit induced Dirac states in quantum point contacts (2015)

Tommy Li

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Tommy Li The quantum transmission problem for a particle moving in a quantum point contact in the presence of a Rashba spin-orbit interaction and applied magnetic field is solved semiclassically. A strong Rashba interaction and parallel magnetic field form emergent Dirac states at the center of the constrict… [Phys. Rev. B 92, 085302] Published Mon Aug 10, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Giant spin-orbit-induced spin splitting in Bi zigzag chains on GaAs(110) (2015)

Hyun-Jung Kim and Jun-Hyung Cho

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Hyun-Jung Kim and Jun-Hyung Cho The search for one-dimensional electron systems with a giant Rashba-type spin splitting is of importance for the application of spin transport. Here we report, based on a first-principles density-functional-theory calculation, that Bi zigzag chains formed on a heterogeneous GaAs(110) surface have a … [Phys. Rev. B 92, 085303] Published Mon Aug 10, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Size-dependent line broadening in the emission spectra of single GaAs quantum dots: Impact of surface charge on spectral diffusion (2015)

Neul Ha, Takaaki Mano, Ying-Lin Chou, Yu-Nien Wu, Shun-Jen Cheng, Juanita Bocquel, Paul M. Koenraad, Akihiro Ohtake, Yoshiki Sakuma, Kazuaki Sakoda, and Takashi Kuroda

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Neul Ha, Takaaki Mano, Ying-Lin Chou, Yu-Nien Wu, Shun-Jen Cheng, Juanita Bocquel, Paul M. Koenraad, Akihiro Ohtake, Yoshiki Sakuma, Kazuaki Sakoda, and Takashi Kuroda Making use of droplet epitaxy, we systematically controlled the height of self-assembled GaAs quantum dots by more than one order of magnitude. The photoluminescence spectra of single quantum dots revealed the strong dependence of the spectral linewidth on the dot height. Tall dots with a height of … [Phys. Rev. B 92, 075306] Published Mon Aug 10, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Spherically symmetric solution of f(R,G) gravity at low energy (2015)

Bofeng Wu and Bo-Qiang Ma

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Bofeng Wu and Bo-Qiang Ma The weak-field and slow-motion limit of f ( R , G ) gravity is developed up to ( v / c ) 4 order in a spherically symmetric background. Considering the Taylor expansion of a general function f around vanishing values of R and G , we present general vacuum solutions up to ( v / c ) 4 order for the gravitational fiel… [Phys. Rev. D 92, 044012] Published Mon Aug 10, 2015

Schlagwort(e): General Relativity and Gravitation

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First-principles embedded-cluster calculations of the neutral and charged oxygen vacancy at the rutile TiO_{2} (110) surface (2015)

Daniel Berger, Harald Oberhofer, and Karsten Reuter

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Daniel Berger, Harald Oberhofer, and Karsten Reuter We perform full-potential screened-hybrid density-functional theory calculations to compare the thermodynamic stability of neutral and charged states of the surface oxygen vacancy at the rutile TiO 2 (110) surface. Solid-state (QM/MM) embedded-cluster calculations are employed to account for the stron… [Phys. Rev. B 92, 075308] Published Tue Aug 11, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Intrinsic curvature of thermodynamic potentials for black holes with critical points (2015)

Brian P. Dolan

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Brian P. Dolan The geometry of thermodynamic state space is studied for asymptotically anti–de Sitter black holes in D -dimensional space-times. Convexity of thermodynamic potentials and the analytic structure of the response functions is analyzed. The thermodynamic potentials can be used to define a metric on the … [Phys. Rev. D 92, 044013] Published Tue Aug 11, 2015

Schlagwort(e): General Relativity and Gravitation

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Diamagnetism in wire medium metamaterials: Theory and experiment (2015)

I. Yagupov, D. Filonov, A. Ageyskiy, S. Kosulnikov, M. Hasan, I. V. Iorsh, and P. A. Belov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): I. Yagupov, D. Filonov, A. Ageyskiy, S. Kosulnikov, M. Hasan, I. V. Iorsh, and P. A. Belov A strong diamagnetic response of a wire medium with a finite wire radius is reported. Contrary to the previous works where it was assumed that the wire medium exhibits only an electric response, we show that the nonzero magnetic susceptibility has to be taken into account for a proper effective medi… [Phys. Rev. B 92, 041304(R)] Published Wed Jul 29, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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9

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Phonon thermoelectric transistors and rectifiers (2015)

Jian-Hua Jiang, Manas Kulkarni, Dvira Segal, and Yoseph Imry

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): Jian-Hua Jiang, Manas Kulkarni, Dvira Segal, and Yoseph Imry We describe nonlinear phonon-thermoelectric devices where charge current and electronic and phononic heat currents are coupled, driven by voltage and temperature biases, when phonon-assisted inelastic processes dominate the transport. Our thermoelectric transistors and rectifiers can be realized in … [Phys. Rev. B 92, 045309] Published Wed Jul 29, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Orbital Kondo effect in fractional quantum Hall systems (2015)

Yashar Komijani, Pascal Simon, and Ian Affleck

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Yashar Komijani, Pascal Simon, and Ian Affleck We study the transport properties of a charge qubit coupling two chiral Luttinger liquids, realized by two antidots placed between the edges of an integer ν = 1 or fractional ν = 1 / 3 quantum Hall bar. We show that in the limit of a large capacitive coupling between the antidots, their quasiparticle occu… [Phys. Rev. B 92, 075301] Published Mon Aug 03, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Fast long-distance control of spin qubits by photon-assisted cotunneling (2015)

Peter Stano, Jelena Klinovaja, Floris R. Braakman, Lieven M. K. Vandersypen, and Daniel Loss

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Peter Stano, Jelena Klinovaja, Floris R. Braakman, Lieven M. K. Vandersypen, and Daniel Loss We investigate theoretically the long-distance coupling and spin exchange in an array of quantum dot spin qubits in the presence of microwaves. We find that photon-assisted cotunneling is boosted at resonances between photon and energies of virtually occupied excited states and show how to make it s… [Phys. Rev. B 92, 075302] Published Tue Aug 04, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Generation of entangled photon strings using NV centers in diamond (2015)

D. D. Bhaktavatsala Rao, Sen Yang, and Jörg Wrachtrup

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): D. D. Bhaktavatsala Rao, Sen Yang, and Jörg Wrachtrup We present a scheme to generate entangled photons using nitrogen vacancy (NV) centers in diamond. We show how the long-lived nuclear spin in diamond can mediate entanglement between multiple photons, thereby increasing the length of the entangled photon string. With the proposed scheme one could gen… [Phys. Rev. B 92, 081301(R)] Published Thu Aug 06, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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New constraints on f(R) gravity from clusters of galaxies (2015)

Matteo Cataneo, David Rapetti, Fabian Schmidt, Adam B. Mantz, Steven W. Allen, Douglas E. Applegate, Patrick L. Kelly, Anja von der Linden, and R. Glenn Morris

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Matteo Cataneo, David Rapetti, Fabian Schmidt, Adam B. Mantz, Steven W. Allen, Douglas E. Applegate, Patrick L. Kelly, Anja von der Linden, and R. Glenn Morris The abundance of massive galaxy clusters is a powerful probe of departures from general relativity (GR) on cosmic scales. Despite current stringent constraints placed by stellar and galactic tests, on larger scales alternative theories of gravity such as f ( R ) can still work as effective theories. He… [Phys. Rev. D 92, 044009] Published Fri Aug 07, 2015

Schlagwort(e): General Relativity and Gravitation

Print ISSN: 0556-2821

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Parameter estimation of eccentric inspiraling compact binaries using an enhanced post circular model for ground-based detectors (2015)

Baosan Sun, Zhoujian Cao, Yan Wang, and Hsien-Chi Yeh

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Baosan Sun, Zhoujian Cao, Yan Wang, and Hsien-Chi Yeh Inspiraling compact binaries have been identified as one of the most promising sources for gravitational-wave detection. These binaries are always expected to have been circularized by the gravitational radiation when they enter the detector’s frequency band. However, recent studies indicate that so… [Phys. Rev. D 92, 044034] Published Wed Aug 19, 2015

Schlagwort(e): General Relativity and Gravitation

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15

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Disformal dark energy at colliders (2015)

Philippe Brax, Clare Burrage, and Christoph Englert

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Philippe Brax, Clare Burrage, and Christoph Englert Disformally coupled, light scalar fields arise in many of the theories of dark energy and modified gravity that attempt to explain the accelerated expansion of the Universe. They have proved difficult to constrain with precision tests of gravity because they do not give rise to fifth forces around s… [Phys. Rev. D 92, 044036] Published Thu Aug 20, 2015

Schlagwort(e): General Relativity and Gravitation

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Bekenstein bounds and inequalities between size, charge, angular momentum, and energy for bodies (2015)

Sergio Dain

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Sergio Dain Bekenstein bounds for the entropy of a body imply a universal inequality between size, energy, angular momentum, and charge. We prove this inequality in electromagnetism. We also prove it, for the particular case of zero angular momentum, in general relativity. We further discuss the relation of the… [Phys. Rev. D 92, 044033] Published Wed Aug 19, 2015

Schlagwort(e): General Relativity and Gravitation

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Large linear magnetoresistance in Dirac semimetal Cd_{3} As_{2} with Fermi surfaces close to the Dirac points (2015)

Junya Feng, Yuan Pang, Desheng Wu, Zhijun Wang, Hongming Weng, Jianqi Li, Xi Dai, Zhong Fang, Youguo Shi, and Li Lu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Junya Feng, Yuan Pang, Desheng Wu, Zhijun Wang, Hongming Weng, Jianqi Li, Xi Dai, Zhong Fang, Youguo Shi, and Li Lu We investigated the magnetoresistive behavior of an ideal Dirac semimetal—high-quality single crystals of Cd 3 As 2 with a Fermi level very close to the Dirac point. A large linear magnetoresistance (LMR), up to 3100% in a magnetic field of 14 T, was observed at a temperature of T = 2 K . The detailed fiel… [Phys. Rev. B 92, 081306(R)] Published Wed Aug 19, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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New scalar constraint operator for loop quantum gravity (2015)

Mehdi Assanioussi, Jerzy Lewandowski, and Ilkka Mäkinen

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Mehdi Assanioussi, Jerzy Lewandowski, and Ilkka Mäkinen We present a concrete and explicit construction of a new scalar constraint operator for loop quantum gravity. The operator is defined on the recently introduced space of partially diffeomorphism invariant states, and this space is preserved by the action of the operator. To define the Euclidean part… [Phys. Rev. D 92, 044042] Published Fri Aug 21, 2015

Schlagwort(e): General Relativity and Gravitation

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Energy in first order 2+1 gravity (2015)

Alejandro Corichi and Iraís Rubalcava-García

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): Alejandro Corichi and Iraís Rubalcava-García We consider Λ = 0 three-dimensional gravity with asymptotically flat boundary conditions. This system was studied by Ashtekar and Varadarajan within the second-order formalism—with metric variables—who showed that the Regge-Teitelboim formalism yields a consistent Hamiltonian description where, surpri… [Phys. Rev. D 92, 044040] Published Fri Aug 21, 2015

Schlagwort(e): General Relativity and Gravitation

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Classical resolution of black hole singularities in arbitrary dimension (2015)

D. Bazeia, L. Losano, Gonzalo J. Olmo, D. Rubiera-Garcia, and A. Sanchez-Puente

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): D. Bazeia, L. Losano, Gonzalo J. Olmo, D. Rubiera-Garcia, and A. Sanchez-Puente A metric-affine approach is employed to study higher-dimensional modified gravity theories involving different powers and contractions of the Ricci tensor. It is shown that the field equations are always second-order, as opposed to the standard metric approach, where this is only achieved for Lagran… [Phys. Rev. D 92, 044018] Published Wed Aug 12, 2015

Schlagwort(e): General Relativity and Gravitation

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Near-horizon circular orbits and extremal limit for dirty rotating black holes (2015)

O. B. Zaslavskii

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): O. B. Zaslavskii We consider generic rotating axially symmetric “dirty” (surrounded by matter) black holes. Near-horizon circular equatorial orbits are examined in two different cases of near-extremal (small surface gravity κ ) and exactly extremal black holes. This has a number of qualitative distinctions. In the fi… [Phys. Rev. D 92, 044017] Published Wed Aug 12, 2015

Schlagwort(e): General Relativity and Gravitation

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Higher-dimensional thin-shell wormholes in third-order Lovelock gravity (2015)

Mohammad Reza Mehdizadeh, Mahdi Kord Zangeneh, and Francisco S. N. Lobo

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Mohammad Reza Mehdizadeh, Mahdi Kord Zangeneh, and Francisco S. N. Lobo In this paper, we explore asymptotically flat charged thin-shell wormholes of third order Lovelock gravity in higher dimensions, taking into account the cut-and-paste technique. Using the generalized junction conditions, we determine the energy-momentum tensor of these solutions on the shell, and ex… [Phys. Rev. D 92, 044022] Published Fri Aug 14, 2015

Schlagwort(e): General Relativity and Gravitation

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Gauge and motion in perturbation theory (2015)

Adam Pound

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Adam Pound Through second order in perturbative general relativity, a small compact object in an external vacuum spacetime obeys a generalized equivalence principle: although it is accelerated with respect to the external background geometry, it is in free fall with respect to a certain effective vacuum geomet… [Phys. Rev. D 92, 044021] Published Fri Aug 14, 2015

Schlagwort(e): General Relativity and Gravitation

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Tensor modes in bigravity: Primordial to present (2015)

Matthew C. Johnson and Alexandra Terrana

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Matthew C. Johnson and Alexandra Terrana Massive bigravity, a theoretically consistent modification of general relativity with an additional dynamical rank-two tensor, successfully describes the observed accelerated expansion of the Universe without a cosmological constant. Recent analyses of perturbations around a cosmological background … [Phys. Rev. D 92, 044001] Published Mon Aug 03, 2015

Schlagwort(e): General Relativity and Gravitation

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Quasilocal rotating conformal Killing horizons (2015)

Ayan Chatterjee and Avirup Ghosh

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Ayan Chatterjee and Avirup Ghosh The formulation of quasilocal conformal Killing horizons (CKH) is extended to include rotation. This necessitates that the horizon be foliated by 2-spheres which may be distorted. Matter degrees of freedom which fall through the horizon are represented by a real scalar field. We show that these rota… [Phys. Rev. D 92, 044003] Published Mon Aug 03, 2015

Schlagwort(e): General Relativity and Gravitation

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Plane wave holonomies in quantum gravity. II. A sine wave solution (2015)

Donald E. Neville

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Donald E. Neville This paper constructs an approximate sinusoidal wave packet solution to the equations of canonical gravity. The theory uses holonomy-flux variables with support on a lattice ( LHF = lattice − holonomy flux ). There is an SU(2) holonomy on each edge of the LHF simplex, and the goal is to study the behavior… [Phys. Rev. D 92, 044006] Published Mon Aug 03, 2015

Schlagwort(e): General Relativity and Gravitation

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Experimental mathematics meets gravitational self-force (2015)

Nathan K. Johnson-Mc; Daniel, Abhay G. Shah, and Bernard F. Whiting

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Nathan K. Johnson-McDaniel, Abhay G. Shah, and Bernard F. Whiting This paper provides a means of extracting analytical expressions for Post-Newtonian expansion coefficients from accurate numerical work. It should prove extremely useful, especially to the growing community involved in detailed numerical work in General Relativity. [Phys. Rev. D 92, 044007] Published Tue Aug 04, 2015

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Antiferromagnetic structures and electronic energy levels at reconstructed NiO(111) surfaces: A DFT+U study (2015)

Lesheng Li and Yosuke Kanai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Lesheng Li and Yosuke Kanai We studied how the surface reconstruction and passivation influence the antiferromagnetic and electronic structures of NiO(111) surface using first-principles electronic structure calculations. These features lead to a surprisingly wide variety of different surface electronic structures, and some su... [Phys. Rev. B 91, 235304] Published Wed Jun 03, 2015

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Entangled squeezed states in noncommutative spaces with minimal length uncertainty relations (2015)

Sanjib Dey and Véronique Hussin

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Sanjib Dey and Véronique Hussin We provide an explicit construction of entangled states in a noncommutative space with nonclassical states, particularly with the squeezed states. Noncommutative systems are found to be more entangled than the usual quantum mechanical systems. The noncommutative parameter provides an additional degr... [Phys. Rev. D 91, 124017] Published Thu Jun 04, 2015

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Black hole initial data without elliptic equations (2015)

István Rácz and Jeffrey Winicour

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): István Rácz and Jeffrey Winicour We explore whether a new method to solve the constraints of Einstein’s equations can be applied to provide initial data for black holes. We show that this method, which does not involve elliptic equations, can be successfully applied to a nonlinear perturbation of a Schwarzschild black hole by estab... [Phys. Rev. D 91, 124013] Published Wed Jun 03, 2015

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Comparison between self-force and post-Newtonian dynamics: Beyond circular orbits (2015)

Sarp Akcay, Alexandre Le Tiec, Leor Barack, Norichika Sago, and Niels Warburton

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Sarp Akcay, Alexandre Le Tiec, Leor Barack, Norichika Sago, and Niels Warburton The gravitational self-force (GSF) and post-Newtonian (PN) schemes are complementary approximation methods for modeling the dynamics of compact binary systems. Comparison of their results in an overlapping domain of validity provides a crucial test for both methods and can be used to enhance their a... [Phys. Rev. D 91, 124014] Published Wed Jun 03, 2015

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Physical infeasibility of geodesic dissipative dust as a source of gravitational radiation (2015)

L. Herrera, A. Di Prisco, and J. Ospino

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): L. Herrera, A. Di Prisco, and J. Ospino Using a framework based on the 1 + 3 formalism, we show that a source represented by a geodesic, dissipative, rotational dust, endowed with axial and reflection symmetry, violates regularity conditions at the center of the fluid distribution unless the dissipative flux vanishes. In this latter case, t... [Phys. Rev. D 91, 124015] Published Wed Jun 03, 2015

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Post-Newtonian effects on the stability of the triangular solution in the three-body problem for general masses (2015)

Kei Yamada, Takuya Tsuchiya, and Hideki Asada

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Kei Yamada, Takuya Tsuchiya, and Hideki Asada Continuing work initiated in earlier publications [T. Ichita et al. , Phys. Rev. D 83 , 084026 (2011); K. Yamada and H. Asada, Phys. Rev. D 86 , 124029 (2012)], we examine the post-Newtonian (PN) effects on the stability of the triangular solution in the relativistic three-body problem for general mass... [Phys. Rev. D 91, 124016] Published Wed Jun 03, 2015

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Note on linearized stability of Schwarzschild thin-shell wormholes with variable equations of state (2015)

Victor Varela

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Victor Varela We discuss how the assumption of variable equation of state (EoS) allows the elimination of the instability at equilibrium throat radius a 0 = 3 M featured by previous Schwarzschild thin-shell wormhole models. Unobstructed stability regions are found for three choices of variable EoS. Two of these EoS e… [Phys. Rev. D 92, 044002] Published Mon Aug 03, 2015

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f(R)-modified gravity, Wald entropy, and the generalized uncertainty principle (2015)

Fayçal Hammad

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Fayçal Hammad Wald’s entropy formula allows one to find the entropy of black holes’ event horizon within any diffeomorphism invariant theory of gravity. When applied to general relativity, the formula yields the Bekenstein-Hawking result but, for any other gravitational action that departs from the Hilbert action… [Phys. Rev. D 92, 044004] Published Mon Aug 03, 2015

Schlagwort(e): General Relativity and Gravitation

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Plane wave holonomies in quantum gravity. I. A model (2015)

Donald E. Neville

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Donald E. Neville This is the first of two papers which study the behavior of the SU(2) holonomies of canonical quantum gravity, when they are acted upon by a unidirectional, plane gravity wave. The present paper constructs a model based on holonomies and fluxes having support on a lattice (LHF denotes lattice-holono… [Phys. Rev. D 92, 044005] Published Mon Aug 03, 2015

Schlagwort(e): General Relativity and Gravitation

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Optical signatures of spin-dependent coupling in semimagnetic quantum dot molecules (2015)

Ł. Kłopotowski, P. Wojnar, Ł. Cywiński, T. Jakubczyk, M. Goryca, K. Fronc, T. Wojtowicz, and G. Karczewski

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Ł. Kłopotowski, P. Wojnar, Ł. Cywiński, T. Jakubczyk, M. Goryca, K. Fronc, T. Wojtowicz, and G. Karczewski We present photoluminescence studies of CdTe and Cd 1 − x Mn x Te quantum dots grown in two adjacent layers. We show that when the dots are 8 nm apart, their magneto-optical properties—Zeeman shifts and transition linewidths—are analogous to those of individual CdTe or Cd 1 − x Mn x Te dots. When the dots are g… [Phys. Rev. B 92, 075303] Published Tue Aug 04, 2015

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Tight-binding analysis of Si and GaAs ultrathin bodies with subatomic wave-function resolution (2015)

Yaohua P. Tan, Michael Povolotskyi, Tillmann Kubis, Timothy B. Boykin, and Gerhard Klimeck

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Yaohua P. Tan, Michael Povolotskyi, Tillmann Kubis, Timothy B. Boykin, and Gerhard Klimeck Empirical tight-binding (ETB) methods are widely used in atomistic device simulations. Traditional ways of generating the ETB parameters rely on direct fitting to bulk experiments or theoretical electronic bands. However, ETB calculations based on existing parameters lead to unphysical results in ul… [Phys. Rev. B 92, 085301] Published Tue Aug 04, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Inflation from cosmological constant and nonminimally coupled scalar (2015)

Dražen Glavan, Anja Marunović, and Tomislav Prokopec

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Dražen Glavan, Anja Marunović, and Tomislav Prokopec We consider inflation in a universe with a positive cosmological constant and a nonminimally coupled scalar field, in which the field couples both quadratically and quartically to the Ricci scalar. When considered in the Einstein frame and when the nonminimal couplings are negative, the field starts… [Phys. Rev. D 92, 044008] Published Tue Aug 04, 2015

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Nonlinear spin transport in a rectifying ferromagnet/semiconductor Schottky contact (2015)

R. Jansen, A. Spiesser, H. Saito, and S. Yuasa

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): R. Jansen, A. Spiesser, H. Saito, and S. Yuasa The electrical creation and detection of spin accumulation in ferromagnet/semiconductor Schottky contacts that exhibit highly nonlinear and rectifying electrical transport is evaluated. If the spin accumulation in the semiconductor is small, the expression for the spin voltage is identical to that o… [Phys. Rev. B 92, 075304] Published Thu Aug 06, 2015

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Polarization-correlated photons from a positively charged quantum dot (2015)

Y. Cao, A. J. Bennett, I. Farrer, D. A. Ritchie, and A. J. Shields

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Y. Cao, A. J. Bennett, I. Farrer, D. A. Ritchie, and A. J. Shields Polarized cross-correlation spectroscopy on a quantum dot charged with a single hole shows the sequential emission of photons with common circular polarization. This effect is visible without magnetic field, but becomes more pronounced as the field along the quantization axis is increased. We interp… [Phys. Rev. B 92, 081302(R)] Published Fri Aug 07, 2015

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Dynamical optical tuning of the coherent phonon detection sensitivity in DBR-based GaAs optomechanical resonators (2015)

P. Sesin, P. Soubelet, V. Villafañe, A. E. Bruchhausen, B. Jusserand, A. Lemaître, N. D. Lanzillotti-Kimura, and A. Fainstein

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): P. Sesin, P. Soubelet, V. Villafañe, A. E. Bruchhausen, B. Jusserand, A. Lemaître, N. D. Lanzillotti-Kimura, and A. Fainstein We present a detailed time-resolved differential reflectivity study of the electronic and the coherent phonon generation response of a GaAs optical microcavity after resonant picosecond laser pulse excitation. A complex behavior is observed as a function of laser–cavity-mode detuning and incident po… [Phys. Rev. B 92, 075307] Published Tue Aug 11, 2015

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Mass and thermodynamic volume in Lifshitz spacetimes (2015)

W. G. Brenna, Robert B. Mann, and Miok Park

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): W. G. Brenna, Robert B. Mann, and Miok Park We examine the concept of black hole thermodynamic volume and its consistency with thermodynamic mass in spacetimes that are not asymptotically flat but instead have anisotropic Lifshitz scaling symmetry. We find that the generalized Smarr relation in anti–de Sitter space—extended to include a press… [Phys. Rev. D 92, 044015] Published Tue Aug 11, 2015

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Theory of interacting topological crystalline insulators (2015)

Hiroki Isobe and Liang Fu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Hiroki Isobe and Liang Fu We study the effect of electron interactions in topological crystalline insulators (TCIs) protected by mirror symmetry, which are realized in the SnTe material class and host multivalley Dirac fermion surface states. We find that interactions reduce the integer classification of noninteracting TCIs … [Phys. Rev. B 92, 081304(R)] Published Mon Aug 10, 2015

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Strain-induced coherent dynamics of coupled carriers and Mn spins in a quantum dot (2015)

A. Lafuente-Sampietro, H. Boukari, and L. Besombes

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): A. Lafuente-Sampietro, H. Boukari, and L. Besombes We report on the coherent dynamics of the spin of an individual magnetic atom coupled to carriers in a semiconductor quantum dot which has been investigated by resonant photoluminescence of the positively charged exciton ( X + ) . We demonstrate that a positively charged CdTe/ZnTe quantum dot doped with… [Phys. Rev. B 92, 081305(R)] Published Mon Aug 10, 2015

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Dissipative soliton protocols in semiconductor microcavities at finite temperatures (2015)

D. V. Karpov, I. G. Savenko, H. Flayac, and N. N. Rosanov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): D. V. Karpov, I. G. Savenko, H. Flayac, and N. N. Rosanov We consider exciton polaritons in a semiconductor microcavity with a saturable absorber in the growth direction of the heterostructure. This feature promotes additional nonlinear losses of the system with the emergence of bistability of the condensate particles number on the nonresonant (electrical … [Phys. Rev. B 92, 075305] Published Mon Aug 10, 2015

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Road to MOND: A novel perspective (2015)

Mordehai Milgrom

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Mordehai Milgrom Accepting that galactic mass discrepancies are due to modified dynamics, I show why it is specifically the Modified Newtonian dynamics (MOND) paradigm that is pointed to cogently. MOND is thus discussed here as a special case of a larger class of modified dynamics theories whereby galactic systems w… [Phys. Rev. D 92, 044014] Published Tue Aug 11, 2015

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Analytical solutions of the geodesic equation in the spacetime of a black hole in f(R) gravity (2015)

Saheb Soroushfar, Reza Saffari, Jutta Kunz, and Claus Lämmerzahl

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Saheb Soroushfar, Reza Saffari, Jutta Kunz, and Claus Lämmerzahl We consider the motion of test particles in the spacetime of a black hole in f ( R ) gravity. The complete set of analytic solutions of the geodesic equation in the spacetime of this black hole is presented. The geodesic equations are solved in terms of Weierstrass elliptic functions and derivatives of… [Phys. Rev. D 92, 044010] Published Tue Aug 11, 2015

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Modified gravity in three dimensional metric-affine scenarios (2015)

Cosimo Bambi, M. Ghasemi-Nodehi, and D. Rubiera-Garcia

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Cosimo Bambi, M. Ghasemi-Nodehi, and D. Rubiera-Garcia We consider metric-affine scenarios where a modified gravitational action is sourced by electrovacuum fields in a three dimensional space-time. We first study the case of f ( R ) theories, finding deviations near the center as compared to the solutions of general relativity. We then consider Born-Infel… [Phys. Rev. D 92, 044016] Published Tue Aug 11, 2015

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Asymptotics with a positive cosmological constant. II. Linear fields on de Sitter spacetime (2015)

Abhay Ashtekar, Béatrice Bonga, and Aruna Kesavan

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): Abhay Ashtekar, Béatrice Bonga, and Aruna Kesavan Linearized gravitational waves in de Sitter spacetime are analyzed in detail to obtain guidance for constructing the theory of gravitational radiation in presence of a positive cosmological constant in full, nonlinear general relativity. Specifically, (i) In the exact theory, the intrinsic geometry … [Phys. Rev. D 92, 044011] Published Tue Aug 11, 2015

Schlagwort(e): General Relativity and Gravitation

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Nonmonotonically tunable Rashba spin-orbit coupling by multiple-band filling control in SrTiO_{3} -based interfacial d-electron gases (2015)

Haixing Liang, Long Cheng, Laiming Wei, Zhenlin Luo, Guolin Yu, Changgan Zeng, and Zhenyu Zhang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): Haixing Liang, Long Cheng, Laiming Wei, Zhenlin Luo, Guolin Yu, Changgan Zeng, and Zhenyu Zhang Spin-orbit coupling (SOC) for d -electron gas can be substantially enriched compared with the s p -electron gas due to the delicate ordering of the multiple d subbands. Here, we demonstrate the nontrivial Rashba SOC effect at SrTiO 3 -based interfaces ( LaAlO 3 / SrTiO 3 and LaVO 3 / SrTiO 3 ) directly related to … [Phys. Rev. B 92, 075309] Published Wed Aug 12, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Magnetoresistance quantum oscillations in a magnetic two-dimensional electron gas (2015)

J. Kunc, B. A. Piot, D. K. Maude, M. Potemski, R. Grill, C. Betthausen, D. Weiss, V. Kolkovsky, G. Karczewski, and T. Wojtowicz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): J. Kunc, B. A. Piot, D. K. Maude, M. Potemski, R. Grill, C. Betthausen, D. Weiss, V. Kolkovsky, G. Karczewski, and T. Wojtowicz At low temperatures, the longitudinal resistivity of metallic systems exhibits quantum oscillations when submitted to a sufficiently high magnetic field. The authors report magneto-transport study of a high quality magnetic two-dimensional electron gas formed in a diluted magnetic CdMnTe quantum well. They find that the Shubnikov-de Haas characteristics is well-described by incorporating the electron Mn exchange interaction into the traditional Lifshitz-Kosevich formalism in a “mean field” approach. [Phys. Rev. B 92, 085304] Published Wed Aug 12, 2015

Schlagwort(e): Semiconductors II: surfaces, interfaces, microstructures, and related topics

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Temperature-tunable semiconductor metamaterial (2015)

K. L. Koshelev and A. A. Bogdanov

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): K. L. Koshelev and A. A. Bogdanov We propose a class of temperature-tunable semiconductor metamaterials for terahertz applications. These metamaterials are based on doped semiconductor superlattices with ultrathin barriers of about 1 nm thickness. Due to the tunnel transparency of the barriers, layers of the superlattice cannot be c… [Phys. Rev. B 92, 085305] Published Fri Aug 14, 2015

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Entropy current in two dimensional anomalous hydrodynamics and a bound on the sum of the response parameters (2015)

Rabin Banerjee, Shirsendu Dey, and Bibhas Ranjan Majhi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Rabin Banerjee, Shirsendu Dey, and Bibhas Ranjan Majhi The exact expression for the entropy current of a fluid in presence of two dimensional gravitational anomalies is given. To make it compatible with the second law of thermodynamics; i.e. positivity of the entropy production rate of a system (which is considered to be fundamental), we find a bound on… [Phys. Rev. D 92, 044019] Published Thu Aug 13, 2015

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Inside the Schwarzschild-Tangherlini black holes (2015)

Jerzy Matyjasek and Paweł Sadurski

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Jerzy Matyjasek and Paweł Sadurski The first-order semiclassical Einstein field equations are solved in the interior of the Schwarzschild-Tangherlini black holes. The source term is taken to be the stress-energy tensor of the quantized massive scalar field with arbitrary curvature coupling calculated within the framework of the Schwi… [Phys. Rev. D 92, 044023] Published Fri Aug 14, 2015

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Neutron stars in Rastall gravity (2015)

A. M. Oliveira, H. E. S. Velten, J. C. Fabris, and L. Casarini

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): A. M. Oliveira, H. E. S. Velten, J. C. Fabris, and L. Casarini We calculate static and spherically symmetric solutions for the Rastall modification of gravity to describe neutron stars (NS). The key feature of the Rastall gravity is the nonconservation of the energy-momentum tensor proportionally to the space-time curvature. Using realistic equations of state f… [Phys. Rev. D 92, 044020] Published Fri Aug 14, 2015

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Parametrized post-Newtonian limit of Horndeski’s gravity theory (2015)

Manuel Hohmann

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): Manuel Hohmann We discuss the parametrized post-Newtonian (PPN) limit of Horndeski’s theory of gravity, also known under the name generalized G-inflation or G 2 -inflation, which is the most general scalar-tensor theory of gravity with at most second-order field equations in four dimensions. We derive conditions on … [Phys. Rev. D 92, 064019] Published Tue Sep 15, 2015

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Revision of the brick wall method for calculating the black hole thermodynamic quantities (2015)

F. Lenz, K. Ohta, and K. Yazaki

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): F. Lenz, K. Ohta, and K. Yazaki Within the framework of the “brick wall model,” a novel method is developed to compute the contributions of a scalar field to the thermodynamic quantities of black holes. The relations between (transverse) momenta and frequencies in Rindler space are determined numerically with high accuracy and ana… [Phys. Rev. D 92, 064018] Published Tue Sep 15, 2015

Schlagwort(e): General Relativity and Gravitation

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Scaling exponents for lattice quantum gravity in four dimensions (2015)

Herbert W. Hamber

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-16

Beschreibung: Author(s): Herbert W. Hamber In this work nonperturbative aspects of quantum gravity are investigated using the lattice formulation, and some new results are presented for critical exponents, amplitudes, and invariant correlation functions. Values for the universal scaling dimensions are compared with other nonperturbative appr… [Phys. Rev. D 92, 064017] Published Mon Sep 14, 2015

Schlagwort(e): General Relativity and Gravitation

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Lovelock black holes with a nonconstant curvature horizon (2015)

Seiju Ohashi and Masato Nozawa

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): Seiju Ohashi and Masato Nozawa This paper studies a class of D = n + 2 ( ≥ 6 ) dimensional solutions to Lovelock gravity that is described by the warped product of a two-dimensional Lorentzian metric and an n -dimensional Einstein space. Assuming that the angular part of the stress-energy tensor is proportional to the Einstein metric, it … [Phys. Rev. D 92, 064020] Published Tue Sep 15, 2015

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Bifurcation of the quasinormal spectrum and zero damped modes for rotating dilatonic black holes (2015)

K. D. Kokkotas, R. A. Konoplya, and A. Zhidenko

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-17

Beschreibung: Author(s): K. D. Kokkotas, R. A. Konoplya, and A. Zhidenko It has been recently found that for the near extremal Kerr black holes appearing of zero damped modes (accompanied by quasinormal mode branching) signifies about inapplicability of the regime of small perturbations and the onset of turbulence. Here we show that this phenomenon is not limited by Kerr… [Phys. Rev. D 92, 064022] Published Wed Sep 16, 2015

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Near horizon hidden symmetry and entropy of Sultana-Dyer black hole: A time dependent case (2015)

Bibhas Ranjan Majhi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Bibhas Ranjan Majhi The nonextremal stationary black holes do have “hidden” conformal symmetry in which case the generators form the S L ( 2 , R ) group. Here, I explicitly show that the Sultana-Dyer black hole solution also possesses the similar near horizon conformal symmetry. This is the first example of a time dependent … [Phys. Rev. D 92, 064026] Published Fri Sep 18, 2015

Schlagwort(e): General Relativity and Gravitation

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Metric perturbations produced by eccentric equatorial orbits around a Kerr black hole (2015)

Maarten van de Meent and Abhay G. Shah

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Maarten van de Meent and Abhay G. Shah How does the spacetime geometry of a spinning (Kerr) black hole change when a much lighter mass orbits it in an elliptic trajectory in the equatorial plane? Combining analytic and numerical techniques, corrections to the metric as a function of the small mass ratio are reported. [Phys. Rev. D 92, 064025] Published Thu Sep 17, 2015

Schlagwort(e): General Relativity and Gravitation

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Distinguishing general relativity and f(R) gravity with the gravitational lensing Minkowski functionals (2015)

Chenxiaoji Ling, Qiao Wang, Ran Li, Baojiu Li, Jie Wang, and Liang Gao

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Chenxiaoji Ling, Qiao Wang, Ran Li, Baojiu Li, Jie Wang, and Liang Gao We explore the Minkowski functionals (MFs) of weak lensing convergence map to distinguish between f ( R ) gravity and the general relativity (GR). The mock weak lensing convergence maps are constructed with a set of high-resolution simulations assuming different gravity models. It is shown that the len… [Phys. Rev. D 92, 064024] Published Thu Sep 17, 2015

Schlagwort(e): General Relativity and Gravitation

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Thermodynamics of Gauss-Bonnet-dilaton Lifshitz black branes (2015)

M. Kord Zangeneh, M. H. Dehghani, and A. Sheykhi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): M. Kord Zangeneh, M. H. Dehghani, and A. Sheykhi We explore an effective supergravity action in the presence of a massless gauge field which contains a Gauss-Bonnet term as well as a dilaton field. We construct a new class of black brane solutions of this theory with a Lifshitz asymptotic by fixing the parameters of the model such that the asympto… [Phys. Rev. D 92, 064023] Published Thu Sep 17, 2015

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Warped-AdS_{3} black holes with scalar halo (2015)

Gaston Giribet and Minas Tsoukalas

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-19

Beschreibung: Author(s): Gaston Giribet and Minas Tsoukalas We construct a stretched (aka warped) anti–de Sitter black hole in three dimensions supported by a real scalar field configuration. The latter is regular everywhere outside and on the horizon. No-hair theorems in three dimensions demand the matter be coupled to the curvature in a nonminimal way; how… [Phys. Rev. D 92, 064027] Published Thu Sep 17, 2015

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Controlled tunneling-induced dephasing of Rabi rotations for high-fidelity hole spin initialization (2015)

P.-L. Ardelt, T. Simmet, K. Müller, C. Dory, K. A. Fischer, A. Bechtold, A. Kleinkauf, H. Riedl, and J. J. Finley

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-22

Beschreibung: Author(s): P.-L. Ardelt, T. Simmet, K. Müller, C. Dory, K. A. Fischer, A. Bechtold, A. Kleinkauf, H. Riedl, and J. J. Finley We report the subpicosecond initialization of a single heavy hole spin in a self-assembled quantum dot with 〉 98.5 % fidelity and without external magnetic field. Using an optically addressable charge and spin storage device we tailor the relative electron and hole tunneling escape time scales from… [Phys. Rev. B 92, 115306] Published Fri Sep 18, 2015

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High-fidelity initialization of long-lived quantum dot hole spin qubits by reduced fine-structure splitting (2015)

A. J. Brash, L. M. P. P. Martins, F. Liu, J. H. Quilter, A. J. Ramsay, M. S. Skolnick, and A. M. Fox

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-22

Beschreibung: Author(s): A. J. Brash, L. M. P. P. Martins, F. Liu, J. H. Quilter, A. J. Ramsay, M. S. Skolnick, and A. M. Fox We demonstrate an on-demand hole spin qubit initialization scheme meeting four key requirements of quantum information processing: fast initialization (1/e ∼ 100 ps), high fidelity ( F 〉 99 % ), long qubit lifetime ( 2 T h 〉 T 2 * ≃ 10 ns ), and compatibility with optical coherent control schemes. This is ach… [Phys. Rev. B 92, 121301(R)] Published Fri Sep 18, 2015

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Chiral electromagnetic waves in Weyl semimetals (2015)

Alexander A. Zyuzin and Vladimir A. Zyuzin

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Alexander A. Zyuzin and Vladimir A. Zyuzin We show that Weyl semimetals with broken time-reversal symmetry can host chiral electromagnetic waves. The magnetization that results in a momentum-space separation of a pair of opposite chirality Weyl nodes is also responsible for the nonzero gyrotropy parameter in the system. It is then shown that… [Phys. Rev. B 92, 115310] Published Wed Sep 23, 2015

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Electrical current from quantum vacuum fluctuations in nanoengines (2015)

Loïc Henriet, Andrew N. Jordan, and Karyn Le Hur

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Loïc Henriet, Andrew N. Jordan, and Karyn Le Hur We theoretically investigate a quantum dot coupled to fermionic (electronic) leads and show how zero-point quantum fluctuations stemming from bosonic environments permit the rectification of the current. The bosonic baths are either external impedances modeled as tunable transmission lines or LC res… [Phys. Rev. B 92, 125306] Published Wed Sep 23, 2015

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Valentino F. Foit and Nico Wintergerst

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Valentino F. Foit and Nico Wintergerst We investigate Hawking evaporation in a recently suggested picture in which black holes are Bose condensates of gravitons at a quantum critical point. There, evaporation of a black hole is due to two intertwined effects. Coherent excitation of a tachyonic breathing mode is responsible for the collap… [Phys. Rev. D 92, 064043] Published Thu Sep 24, 2015

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Harvesting correlations from the quantum vacuum (2015)

Alejandro Pozas-Kerstjens and Eduardo Martín-Martínez

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Alejandro Pozas-Kerstjens and Eduardo Martín-Martínez We analyze the harvesting of entanglement and classical correlations from the quantum vacuum to particle detectors. We assess the impact on the detectors’ harvesting ability of the spacetime dimensionality, the suddenness of the detectors’ switching, their physical size and their internal energy str… [Phys. Rev. D 92, 064042] Published Thu Sep 24, 2015

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Earth-moon Lagrangian points as a test bed for general relativity and effective field theories of gravity (2015)

Emmanuele Battista, Simone Dell’Agnello, Giampiero Esposito, Luciano Di Fiore, Jules Simo, and Aniello Grado

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Emmanuele Battista, Simone Dell’Agnello, Giampiero Esposito, Luciano Di Fiore, Jules Simo, and Aniello Grado We first analyze the restricted four-body problem consisting of the Earth, the Moon, and the Sun as the primaries and a spacecraft as the planetoid. This scheme allows us to take into account the solar perturbation in the description of the motion of a spacecraft in the vicinity of the stable Earth-… [Phys. Rev. D 92, 064045] Published Thu Sep 24, 2015

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Hamiltonian formalism of minimal massive gravity (2015)

Davood Mahdavian Yekta

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-25

Beschreibung: Author(s): Davood Mahdavian Yekta In this paper, we study the three-dimensional minimal massive gravity (MMG) in the Hamiltonian formalism. At first, we define the canonical gauge generators as building blocks in this formalism and then derive the canonical expressions for the asymptotic conserved charges. The construction of a cons… [Phys. Rev. D 92, 064044] Published Thu Sep 24, 2015

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Electron density magnification of the collective spin-orbit field in quantum wells (2015)

F. Baboux, F. Perez, C. A. Ullrich, G. Karczewski, and T. Wojtowicz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): F. Baboux, F. Perez, C. A. Ullrich, G. Karczewski, and T. Wojtowicz The spin-orbit field acting on the spin waves of a spin-polarized electron gas is studied by inelastic light scattering on a CdMnTe quantum well. Above-barrier illumination allows us to vary the electronic density and control the collective Rashba and Dresselhaus coupling constants. We demonstrate t… [Phys. Rev. B 92, 125307] Published Mon Sep 28, 2015

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Photon spheres in Einstein and Einstein-Gauss-Bonnet theories and circular null geodesics in axially-symmetric spacetimes (2015)

Emanuel Gallo and J. R. Villanueva

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Emanuel Gallo and J. R. Villanueva In this article we extend a recent theorem proven by Hod [Upper bound on the radii of black-hole photon spheres, Phys. Lett. B 727 , 345 (2013)] to n -dimensional Einstein and Einstein-Gauss-Bonnet theories, which gives an upper bound for the photon sphere radii of spherically symmetric black holes. A… [Phys. Rev. D 92, 064048] Published Mon Sep 28, 2015

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Cosmological disformal transformations to the Einstein frame and gravitational couplings with matter perturbations (2015)

Shinji Tsujikawa

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Shinji Tsujikawa The disformal transformation of metric g μ ν → Ω 2 ( ϕ ) g μ ν + Γ ( ϕ , X ) ∂ μ ϕ ∂ ν ϕ , where ϕ is a scalar field with the kinetic energy X = ∂ μ ϕ ∂ μ ϕ / 2 , preserves the Lagrangian structure of Gleyzes–Langlois–Piazza–Vernizzi theories (which is the minimum extension of Horndeski theories). In the presence of matter, this tran… [Phys. Rev. D 92, 064047] Published Mon Sep 28, 2015

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Spectral indices in Eddington-inspired Born-Infeld inflation (2015)

Inyong Cho and Jinn-Ouk Gong

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-09-29

Beschreibung: Author(s): Inyong Cho and Jinn-Ouk Gong We investigate the scalar and tensor spectral indices of the quadratic inflation model in Eddington-inspired Born-Infeld (EiBI) gravity. We find that the EiBI corrections to the spectral indices are of second and first order in the slow-roll approximation for the scalar and tensor perturbations, res… [Phys. Rev. D 92, 064046] Published Fri Sep 25, 2015

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Maeda-Dadhich solutions as real black holes (2015)

S. O. Alexeyev, A. N. Petrov, and B. N. Latosh

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): S. O. Alexeyev, A. N. Petrov, and B. N. Latosh Four-dimensional static Schwarzschild-like solutions obtained in [H. Maeda and N. Dadhich, Phys. Rev. D 74 , 021501(R) (2006).H. Maeda and N. Dadhich, Phys. Rev. D 75 , 044007 (2007).N. Dadhich and H. Maeda, Int. J. Mod. Phys. D 17 , 513 (2008).A. Molina and N. Dadhich, Int. J. Mod. Phys. D 18 , 599 (20… [Phys. Rev. D 92, 104046] Published Tue Nov 24, 2015

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Stationary axially symmetric solutions in Brans-Dicke theory (2015)

Pınar Kirezli and Özgür Delice

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Pınar Kirezli and Özgür Delice Stationary, axially symmetric Brans-Dicke-Maxwell solutions are reexamined in the framework of the Brans-Dicke (BD) theory. We see that, employing a particular parametrization of the standard axially symmetric metric simplifies the procedure of obtaining the Ernst equations for axially symmetric ele… [Phys. Rev. D 92, 104045] Published Tue Nov 24, 2015

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Testing long-distance modifications of gravity to 100 astronomical units (2015)

Brandon Buscaino, Daniel De; Bra, Peter W. Graham, Giorgio Gratta, and Timothy D. Wiser

American Physical Society (APS)

In: Physical Review D

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Beschreibung: Author(s): Brandon Buscaino, Daniel DeBra, Peter W. Graham, Giorgio Gratta, and Timothy D. Wiser A proposed space mission would precisely measure deviations from Newtonian gravity on a scale of 100 astronomical units. [Phys. Rev. D 92, 104048] Published Tue Nov 24, 2015

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Nonprojectable Horava-Lifshitz gravity without the unwanted scalar graviton (2015)

Masud Chaichian, Josef Klusoň, and Markku Oksanen

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Masud Chaichian, Josef Klusoň, and Markku Oksanen We consider a way of eliminating the unwanted scalar graviton from Horava-Lifshitz gravity that is achieved via introduction of certain additional constraints. We perform canonical analysis of both projectable and nonprojectable versions of the theory. We obtain the structure of constraints in each … [Phys. Rev. D 92, 104043] Published Mon Nov 23, 2015

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Third order solutions of cosmological density perturbations in Horndeski’s most general scalar-tensor theory with the Vainshtein mechanism (2015)

Yuichiro Takushima, Ayumu Terukina, and Kazuhiro Yamamoto

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-19

Beschreibung: Author(s): Yuichiro Takushima, Ayumu Terukina, and Kazuhiro Yamamoto We study the third order solutions of the cosmological density perturbations in Horndeski’s most general scalar-tensor theory under the condition that the Vainshtein mechanism is at work. In this work, we thoroughly investigate the independence property of the functions describing the nonlinear mode… [Phys. Rev. D 92, 104033] Published Tue Nov 17, 2015

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Dynamical quantum depletion in polariton condensates (2015)

Selma Koghee and Michiel Wouters

American Physical Society (APS)

In: Physical Review B

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Beschreibung: Author(s): Selma Koghee and Michiel Wouters We present a theoretical study of the quantum depletion of microcavity polaritons that are excited with a resonant laser pulse. The dynamics of the quantum fluctuations are interpreted in the context of quantum quenches in general and in terms of the dynamical Casimir effect in particular. We comput… [Phys. Rev. B 92, 195309] Published Tue Nov 24, 2015

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Interstitial iron impurities at cores of dissociated dislocations in silicon (2015)

Benedikt Ziebarth, Matous Mrovec, Christian Elsässer, and Peter Gumbsch

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Benedikt Ziebarth, Matous Mrovec, Christian Elsässer, and Peter Gumbsch Dislocations play an important role in semiconductor devices made of crystalline silicon (Si). They are known to be strongly performance-limiting defects in solar cell applications, since they act as preferred segregation sites for metallic impurities. In this work we investigate the segregation of … [Phys. Rev. B 92, 195308] Published Tue Nov 24, 2015

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Controlling circular polarization of light emitted by quantum dots using chiral photonic crystal slabs (2015)

S. V. Lobanov, S. G. Tikhodeev, N. A. Gippius, A. A. Maksimov, E. V. Filatov, I. I. Tartakovskii, V. D. Kulakovskii, T. Weiss, C. Schneider, J. Geßler, M. Kamp, and S. Höfling

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): S. V. Lobanov, S. G. Tikhodeev, N. A. Gippius, A. A. Maksimov, E. V. Filatov, I. I. Tartakovskii, V. D. Kulakovskii, T. Weiss, C. Schneider, J. Geßler, M. Kamp, and S. Höfling We study the polarization properties of light emitted by quantum dots that are embedded in chiral photonic crystal structures made of achiral planar GaAs waveguides. A modification of the electromagnetic mode structure due to the chiral grating fabricated by partial etching of the waveguide layer ha… [Phys. Rev. B 92, 205309] Published Mon Nov 23, 2015

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Slowly rotating black hole solutions in Horndeski gravity (2015)

Andrea Maselli, Hector O. Silva, Masato Minamitsuji, and Emanuele Berti

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Andrea Maselli, Hector O. Silva, Masato Minamitsuji, and Emanuele Berti We study black hole solutions at first order in the Hartle-Thorne slow-rotation approximation in Horndeski gravity theories. We derive the equations of motion including also cases where the scalar depends linearly on time. In the Hartle-Thorne formalism, all first-order rotational corrections are de… [Phys. Rev. D 92, 104049] Published Wed Nov 25, 2015

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Gravitational wave afterglow in binary neutron star mergers (2015)

Daniela D. Doneva, Kostas D. Kokkotas, and Pantelis Pnigouras

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Daniela D. Doneva, Kostas D. Kokkotas, and Pantelis Pnigouras We study in detail the f -mode secular instability for rapidly rotating neutron stars, putting emphasis on supramassive models which do not have a stable nonrotating counterpart. Such neutron stars are thought to be the generic outcome of the merger of two standard-mass neutron stars. In addition, we… [Phys. Rev. D 92, 104040] Published Mon Nov 23, 2015

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Proper time method in de Sitter space (2015)

Ashok K. Das and Pushpa Kalauni

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Ashok K. Das and Pushpa Kalauni We use the proper time formalism to study a (non-self-interacting) massive Klein-Gordon theory in the two dimensional de Sitter space. We determine the exact Green’s function of the theory by solving the DeWitt-Schwinger equation as well as by calculating the operator matrix element. We point out ho… [Phys. Rev. D 92, 104037] Published Mon Nov 23, 2015

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Mass inflation and curvature divergence near the central singularity in spherical collapse (2015)

Jun-Qi Guo, Pankaj S. Joshi, and José T. Galvez Ghersi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Jun-Qi Guo, Pankaj S. Joshi, and José T. Galvez Ghersi We study spherical scalar collapse toward a black hole formation and examine the asymptotic dynamics near the central singularity of the formed black hole. It is found that, in the vicinity of the singularity, due to the strong backreaction of a scalar field on the geometry, the mass function inflat… [Phys. Rev. D 92, 104044] Published Mon Nov 23, 2015

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Thermodynamics of topological black holes in Brans-Dicke gravity with a power-law Maxwell field (2015)

M. Kord Zangeneh, M. H. Dehghani, and A. Sheykhi

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-11-20

Beschreibung: Author(s): M. Kord Zangeneh, M. H. Dehghani, and A. Sheykhi In this paper, we present a new class of higher-dimensional exact topological black hole solutions of the Brans-Dicke theory in the presence of a power-law Maxwell field as the matter source. For this aim, we introduce a conformal transformation which transforms the Einstein-dilaton-power-law Maxwel… [Phys. Rev. D 92, 104035] Published Thu Nov 19, 2015

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Two-dimensional oxide topological insulator with iron-pnictide superconductor LiFeAs structure (2015)

Qiunan Xu, Zhida Song, Simin Nie, Hongming Weng, Zhong Fang, and Xi Dai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-11-26

Beschreibung: Author(s): Qiunan Xu, Zhida Song, Simin Nie, Hongming Weng, Zhong Fang, and Xi Dai By using first-principles calculations, we propose that ZrSiO can be looked at as a three-dimensional (3D) oxide weak topological insulator (TI) and its single layer is a long-sought-after 2D oxide TI with a band gap up to 30 meV. Calculated phonon spectrum of the single layer ZrSiO indicates it is … [Phys. Rev. B 92, 205310] Published Tue Nov 24, 2015

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Effects of the microphysical equation of state in the mergers of magnetized neutron stars with neutrino cooling (2015)

Carlos Palenzuela, Steven L. Liebling, David Neilsen, Luis Lehner, O. L. Caballero, Evan O’Connor, and Matthew Anderson

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-08-26

Beschreibung: Author(s): Carlos Palenzuela, Steven L. Liebling, David Neilsen, Luis Lehner, O. L. Caballero, Evan O’Connor, and Matthew Anderson We study the merger of binary neutron stars using different realistic, microphysical nuclear equations of state, as well as incorporating magnetic field and neutrino cooling effects. In particular, we concentrate on the influence of the equation of state on the gravitational wave signature and also … [Phys. Rev. D 92, 044045] Published Tue Aug 25, 2015

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Hamilton geometry: Phase space geometry from modified dispersion relations (2015)

Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi, Niccoló Loret, and Christian Pfeifer

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-10-27

Beschreibung: Author(s): Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi, Niccoló Loret, and Christian Pfeifer We describe the Hamilton geometry of the phase space of particles whose motion is characterized by general dispersion relations. In this framework spacetime and momentum space are naturally curved and intertwined, allowing for a simultaneous description of both spacetime curvature and nontrivial mom… [Phys. Rev. D 92, 084053] Published Mon Oct 26, 2015

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One-photon pair production on the expanding de Sitter spacetime (2015)

Robert Blaga

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-10-27

Beschreibung: Author(s): Robert Blaga We study the one-photon scalar pair production QED process on the expanding de Sitter spacetime. Using perturbation theory, we obtain the transition probability and study its properties as a function of the expansion parameter ω . On flat space the process is forbidden by energy-momentum conservation… [Phys. Rev. D 92, 084054] Published Mon Oct 26, 2015

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Charged Einstein-aether black holes and Smarr formula (2015)

Chikun Ding, Anzhong Wang, and Xinwen Wang

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-10-27

Beschreibung: Author(s): Chikun Ding, Anzhong Wang, and Xinwen Wang In the framework of the Einstein-Maxwell-aether theory, we present two new classes of exact charged black hole solutions, which are asymptotically flat and possess the universal as well as Killing horizons. We also construct the Smarr formulas and calculate the temperatures of the horizons, using th… [Phys. Rev. D 92, 084055] Published Mon Oct 26, 2015

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Scattering from charged black holes and supergravity (2015)

Luís C. B. Crispino, Sam R. Dolan, Atsushi Higuchi, and Ednilton S. de Oliveira

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-10-27

Beschreibung: Author(s): Luís C. B. Crispino, Sam R. Dolan, Atsushi Higuchi, and Ednilton S. de Oliveira The scattering cross sections of the unpolarized electromagnetic and gravitational waves are shown to be equal for the extreme Reissner-Nordström black hole using N = 2 supergravity. The conversion cross sections between the unpolarized electromagnetic and gravitational waves are also shown to coincid… [Phys. Rev. D 92, 084056] Published Mon Oct 26, 2015

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Observer dependence of angular momentum in general relativity and its relationship to the gravitational-wave memory effect (2015)

Éanna É. Flanagan and David A. Nichols

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-10-27

Beschreibung: Author(s): Éanna É. Flanagan and David A. Nichols We define a procedure by which observers can measure a type of special-relativistic linear and angular momentum ( P a , J a b ) at a point in a curved spacetime using only the spacetime geometry in a neighborhood of that point. The method is chosen to yield the conventional results in stationary spacetimes… [Phys. Rev. D 92, 084057] Published Mon Oct 26, 2015

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New code for quasiequilibrium initial data of binary neutron stars: Corotating, irrotational, and slowly spinning systems (2015)

Antonios Tsokaros, Kōji Uryū, and Luciano Rezzolla

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-05-29

Beschreibung: Author(s): Antonios Tsokaros, Kōji Uryū, and Luciano Rezzolla We present the extension of our cocal —Compact Object CALculator—code to compute general-relativistic initial data for binary compact-star systems. In particular, we construct quasiequilibrium initial data for equal-mass binaries with spins that are either aligned or antialigned with the orbital angu... [Phys. Rev. D 91, 104030] Published Wed May 27, 2015

Schlagwort(e): General Relativity and Gravitation

Print ISSN: 0556-2821

Digitale ISSN: 1089-4918

Thema: Physik

Publiziert von American Physical Society (APS)

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Black strings in Gauss-Bonnet theory are unstable (2015)

Alex Giacomini, Julio Oliva, and Aldo Vera

American Physical Society (APS)

In: Physical Review D

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Publikationsdatum: 2015-05-29

Beschreibung: Author(s): Alex Giacomini, Julio Oliva, and Aldo Vera We report the existence of unstable s-wave modes for black strings in Gauss-Bonnet theory (which is quadratic in the curvature) in seven dimensions. This theory admits analytic uniform black strings that are, in the transverse section, black holes of the same Gauss-Bonnet theory in six dimensions. A... [Phys. Rev. D 91, 104033] Published Wed May 27, 2015

Schlagwort(e): General Relativity and Gravitation

Print ISSN: 0556-2821

Digitale ISSN: 1089-4918

Thema: Physik

Publiziert von American Physical Society (APS)

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