Quantum discord of the Werner state in noninertial frames

M. A. Mercado Sanchez; Guo Hua Sun; Shi Hai Dong

doi:10.1088/1402-4896/abbf72

Quantum discord of the Werner state in noninertial frames

M. A. Mercado Sanchez, Guo Hua Sun, Shi Hai Dong

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

4 Scopus citations

Abstract

Using the single-mode approximation we study the quantum correlations of a free Dirac field on the Werner state in the noninertial frame. We present analytical quantum discord D and its geometric measurement D_G. We notice that the quantum discord still exists for the system ρARI even in the acceleration limit. We also calculate the entanglement of formation (EOF) and the geometric measure of entanglement (E_G) to compare the behaviors of the entanglement with the quantum discord. The entanglement is nonzero for the fidelity of the Werner state with a Bell state F > 0.5, while the quantum discord is equal to zero only for F = 0.25. We also observe that the quantum discord is more robust to the change of acceleration than the entanglement, which is more sensitive to the acceleration.

Original language	English
Article number	115102
Journal	Physica Scripta
Volume	95
Issue number	11
DOIs	https://doi.org/10.1088/1402-4896/abbf72
State	Published - Nov 2020

Keywords

Mutual information
Noninertial frames
Quantum discord
Werner state

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10.1088/1402-4896/abbf72

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title = "Quantum discord of the Werner state in noninertial frames",

abstract = "Using the single-mode approximation we study the quantum correlations of a free Dirac field on the Werner state in the noninertial frame. We present analytical quantum discord D and its geometric measurement DG. We notice that the quantum discord still exists for the system ρARI even in the acceleration limit. We also calculate the entanglement of formation (EOF) and the geometric measure of entanglement (EG) to compare the behaviors of the entanglement with the quantum discord. The entanglement is nonzero for the fidelity of the Werner state with a Bell state F > 0.5, while the quantum discord is equal to zero only for F = 0.25. We also observe that the quantum discord is more robust to the change of acceleration than the entanglement, which is more sensitive to the acceleration.",

keywords = "Mutual information, Noninertial frames, Quantum discord, Werner state",

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AU - Mercado Sanchez, M. A.

AU - Sun, Guo Hua

AU - Dong, Shi Hai

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Y1 - 2020/11

N2 - Using the single-mode approximation we study the quantum correlations of a free Dirac field on the Werner state in the noninertial frame. We present analytical quantum discord D and its geometric measurement DG. We notice that the quantum discord still exists for the system ρARI even in the acceleration limit. We also calculate the entanglement of formation (EOF) and the geometric measure of entanglement (EG) to compare the behaviors of the entanglement with the quantum discord. The entanglement is nonzero for the fidelity of the Werner state with a Bell state F > 0.5, while the quantum discord is equal to zero only for F = 0.25. We also observe that the quantum discord is more robust to the change of acceleration than the entanglement, which is more sensitive to the acceleration.

AB - Using the single-mode approximation we study the quantum correlations of a free Dirac field on the Werner state in the noninertial frame. We present analytical quantum discord D and its geometric measurement DG. We notice that the quantum discord still exists for the system ρARI even in the acceleration limit. We also calculate the entanglement of formation (EOF) and the geometric measure of entanglement (EG) to compare the behaviors of the entanglement with the quantum discord. The entanglement is nonzero for the fidelity of the Werner state with a Bell state F > 0.5, while the quantum discord is equal to zero only for F = 0.25. We also observe that the quantum discord is more robust to the change of acceleration than the entanglement, which is more sensitive to the acceleration.

KW - Mutual information

KW - Noninertial frames

KW - Quantum discord

KW - Werner state

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DO - 10.1088/1402-4896/abbf72

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VL - 95

JO - Physica Scripta

JF - Physica Scripta

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Quantum discord of the Werner state in noninertial frames

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Keywords

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