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Magnetic anisotropy in epitaxial Py/FeMn/Cu(001) and Py/FeMn/Ni/Cu(001) films (2013)

A. Tan, J. Li, C. A. Jenkins, E. Arenholz, A. Scholl, C. Hwang, and Z. Q. Qiu

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2013-09-07

Beschreibung: Author(s): A. Tan, J. Li, C. A. Jenkins, E. Arenholz, A. Scholl, C. Hwang, and Z. Q. Qiu Py/FeMn/Cu(001) and Py/FeMn/Ni/Cu(001) films were grown and studied as a function of both the FeMn and the Ni thicknesses using rotating magneto-optic Kerr effect and x-ray magnetic circular dichroism. For Py/FeMn/Cu(001), we find that the FeMn antiferromagnetic order switches the sign of the Py fou... [Phys. Rev. B 88, 104404] Published Fri Sep 06, 2013

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Quantum search with interacting Bose-Einstein condensates (2013)

Mahdi Ebrahimi Kahou and David L. Feder

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-12

Beschreibung: Author(s): Mahdi Ebrahimi Kahou and David L. Feder One approach to the development of quantum search algorithms is the quantum walk. A spatial search can be effected by the continuous-time evolution of a single quantum particle on a graph containing a marked site. In many physical implementations, however, one might expect to have multiple particles... [Phys. Rev. A 88, 032310] Published Wed Sep 11, 2013

Schlagwort(e): Quantum information

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Parrondo's paradox and superactivation of classical and quantum capacity of communication channels with memory (2013)

Sergii Strelchuk

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-12

Beschreibung: Author(s): Sergii Strelchuk There exist memoryless zero-capacity quantum channels that when used jointly result in a channel with positive capacity. This phenomenon is called superactivation. Making use of Parrondo's paradox, we exhibit examples of the superactivation-like effect for the capacity of classical communication cha... [Phys. Rev. A 88, 032311] Published Wed Sep 11, 2013

Schlagwort(e): Quantum information

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Thema: Physik

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Advanced magnetic anisotropy determination through isothermal remanent magnetization of nanoparticles (2013)

A. Hillion, A. Tamion, F. Tournus, O. Gaier, E. Bonet, C. Albin, and V. Dupuis

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2013-09-14

Beschreibung: Author(s): A. Hillion, A. Tamion, F. Tournus, O. Gaier, E. Bonet, C. Albin, and V. Dupuis We propose a theoretical framework enabling the simulation of isothermal remanence magnetization (IRM) curves, based on the Stoner-Wohlfarth model combined with the Néel macrospin relaxation time description. We show how low temperature IRM curves, which have many advantages compared to hysteresis l... [Phys. Rev. B 88, 094419] Published Fri Sep 13, 2013

Schlagwort(e): Magnetism

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

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Magnetic structure of the frustrated S=1/2 chain magnet LiCu_{2}O_{2} doped with nonmagnetic Zn (2013)

A. A. Bush, N. Büttgen, A. A. Gippius, V. N. Glazkov, W. Kraetschmer, L. A. Prozorova, L. E. Svistov, A. M. Vasiliev, and A. Zheludev

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2013-09-14

Beschreibung: Author(s): A. A. Bush, N. Büttgen, A. A. Gippius, V. N. Glazkov, W. Kraetschmer, L. A. Prozorova, L. E. Svistov, A. M. Vasiliev, and A. Zheludev We present the results of magnetization, electron spin resonance (ESR), and nuclear magnetic resonance (NMR) measurements on single-crystal samples of the frustrated S =1/2 chain cuprate LiCu 2 O 2 doped with nonmagnetic Zn 2+ . As shown by the x-ray techniques, the crystals of Li(Cu 1− x Zn x ) 2 O 2 with x 〈0... [Phys. Rev. B 88, 104411] Published Fri Sep 13, 2013

Schlagwort(e): Magnetism

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Chiral anomaly and classical negative magnetoresistance of Weyl metals (2013)

D. T. Son and B. Z. Spivak

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2013-09-14

Beschreibung: Author(s): D. T. Son and B. Z. Spivak We consider the classical magnetoresistance of a Weyl metal in which the electron Fermi surface possesses nonzero fluxes of the Berry curvature. Such a system may exhibit large negative magnetoresistance with unusual anisotropy as a function of the angle between the electric and magnetic fields. In ... [Phys. Rev. B 88, 104412] Published Fri Sep 13, 2013

Schlagwort(e): Magnetism

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Thema: Physik

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7

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Block entropy for Kitaev-type spin chains in a transverse field (2013)

V. Subrahmanyam

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-17

Beschreibung: Author(s): V. Subrahmanyam Block entanglement entropy in the ground state of a quantum spin chain is investigated. The spins have Kitaev-type nearest-neighbor interaction, of strength J x or J y , through either x or y components of the spins on alternating bonds, along with a transverse magnetic field h . An exact solution is ob... [Phys. Rev. A 88, 032315] Published Mon Sep 16, 2013

Schlagwort(e): Quantum information

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Thema: Physik

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Bipartite entanglement-annihilating maps: Necessary and sufficient conditions (2013)

Sergey N. Filippov and Mário Ziman

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-17

Beschreibung: Author(s): Sergey N. Filippov and Mário Ziman We fully characterize bipartite entanglement-annihilating (EA) channels that destroy entanglement of any state shared by subsystems and, thus, should be avoided in any entanglement-enabled experiment. Our approach relies on extending the problem to EA positive maps, the cone of which remains invaria... [Phys. Rev. A 88, 032316] Published Mon Sep 16, 2013

Schlagwort(e): Quantum information

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Comment on “Sudden change in quantum discord accompanying the transition from bound to free entanglement” (2013)

Swapan Rana and Preeti Parashar

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-17

Beschreibung: Author(s): Swapan Rana and Preeti Parashar In a recent article [ Phys. Rev. A 87 022340 (2013) ], Yan et al. have studied geometric discord for a well-known class of bound entangled states. Based on their calculation, they claim “It is found that there exists a nondynamic sudden change in quantum discord” for these states. In this Comment, w... [Phys. Rev. A 88, 036301] Published Mon Sep 16, 2013

Schlagwort(e): Quantum information

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Robustness of quantum-randomness expansion protocols in the presence of noise (2013)

Piotr Mironowicz and Marcin Pawłowski

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2013-09-19

Beschreibung: Author(s): Piotr Mironowicz and Marcin Pawłowski In this paper we investigate properties of several randomness generation protocols in the device-independent framework. Using Bell-type inequalities it is possible to certify that the numbers generated by an untrusted device are indeed random. We present a selection of certificates which guarantee t... [Phys. Rev. A 88, 032319] Published Wed Sep 18, 2013

Schlagwort(e): Quantum information

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