Quantum correlations in spin models

Guo Feng Zhang; Heng Fan; Ai Ling Ji; Zhao Tan Jiang; Ahmad Abliz; Wu Ming Liu

doi:10.1016/j.aop.2011.05.002

Quantum correlations in spin models

Guo Feng Zhang^*, Heng Fan, Ai Ling Ji, Zhao Tan Jiang, Ahmad Abliz, Wu Ming Liu

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by the use of measurement-induced disturbance (MID) [S. Luo, Phys. Rev. A 77 (2008) 022301] and geometric measure of quantum discord (GQD) [B. Dakić, V. Vedral, C. Brukner, Phys. Rev. Lett. 105 (2010) 190502]. Their dependences on external magnetic field, spin-spin coupling, and the Dzyaloshinskii-Moriya (DM) interaction are presented in detail. We also compare Bell nonlocality, entanglement measured by concurrence, MID and GQD and illustrate their different characteristics.

Original language	English
Pages (from-to)	2694-2701
Number of pages	8
Journal	Annals of Physics
Volume	326
Issue number	10
DOIs	https://doi.org/10.1016/j.aop.2011.05.002
Publication status	Published - Oct 2011

Keywords

Bell nonlocality
Entanglement
Measurement-induced disturbance (MID)
Spin model

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10.1016/j.aop.2011.05.002

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title = "Quantum correlations in spin models",

abstract = "Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by the use of measurement-induced disturbance (MID) [S. Luo, Phys. Rev. A 77 (2008) 022301] and geometric measure of quantum discord (GQD) [B. Daki{\'c}, V. Vedral, C. Brukner, Phys. Rev. Lett. 105 (2010) 190502]. Their dependences on external magnetic field, spin-spin coupling, and the Dzyaloshinskii-Moriya (DM) interaction are presented in detail. We also compare Bell nonlocality, entanglement measured by concurrence, MID and GQD and illustrate their different characteristics.",

keywords = "Bell nonlocality, Entanglement, Measurement-induced disturbance (MID), Spin model",

author = "Zhang, {Guo Feng} and Heng Fan and Ji, {Ai Ling} and Jiang, {Zhao Tan} and Ahmad Abliz and Liu, {Wu Ming}",

year = "2011",

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doi = "10.1016/j.aop.2011.05.002",

language = "English",

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journal = "Annals of Physics",

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T1 - Quantum correlations in spin models

AU - Zhang, Guo Feng

AU - Fan, Heng

AU - Ji, Ai Ling

AU - Jiang, Zhao Tan

AU - Abliz, Ahmad

AU - Liu, Wu Ming

PY - 2011/10

Y1 - 2011/10

N2 - Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by the use of measurement-induced disturbance (MID) [S. Luo, Phys. Rev. A 77 (2008) 022301] and geometric measure of quantum discord (GQD) [B. Dakić, V. Vedral, C. Brukner, Phys. Rev. Lett. 105 (2010) 190502]. Their dependences on external magnetic field, spin-spin coupling, and the Dzyaloshinskii-Moriya (DM) interaction are presented in detail. We also compare Bell nonlocality, entanglement measured by concurrence, MID and GQD and illustrate their different characteristics.

AB - Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by the use of measurement-induced disturbance (MID) [S. Luo, Phys. Rev. A 77 (2008) 022301] and geometric measure of quantum discord (GQD) [B. Dakić, V. Vedral, C. Brukner, Phys. Rev. Lett. 105 (2010) 190502]. Their dependences on external magnetic field, spin-spin coupling, and the Dzyaloshinskii-Moriya (DM) interaction are presented in detail. We also compare Bell nonlocality, entanglement measured by concurrence, MID and GQD and illustrate their different characteristics.

KW - Bell nonlocality

KW - Entanglement

KW - Measurement-induced disturbance (MID)

KW - Spin model

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VL - 326

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Quantum correlations in spin models

Abstract

Keywords

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