### Abstract

Original language | American English |
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Journal | Frontiers of Physics |

DOIs | |

State | Published - 1 Apr 2019 |

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*Frontiers of Physics*. https://doi.org/10.1007/s11467-018-0876-x

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*Frontiers of Physics*. https://doi.org/10.1007/s11467-018-0876-x

**Entanglement measures of a new type pseudo-pure state in accelerated frames.** / Dong, Qian; Torres-Arenas, Ariadna J.; Sun, Guo Hua; Qiang, Wen Chao; Dong, Shi Hai.

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

TY - JOUR

T1 - Entanglement measures of a new type pseudo-pure state in accelerated frames

AU - Dong, Qian

AU - Torres-Arenas, Ariadna J.

AU - Sun, Guo Hua

AU - Qiang, Wen Chao

AU - Dong, Shi Hai

PY - 2019/4/1

Y1 - 2019/4/1

N2 - © 2019, Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature. In this work we analyze the characteristics of quantum entanglement of the Dirac field in noninertial reference frames in the context of a new type pseudo-pure state, which is composed of the Bell states. This will help us to understand the relationship between the relativity and quantum information theory. Some states will be changed from entangled states into separable ones around the critical value F = 1/4, but there is no such a critical value for the variable y related to acceleration a. We find that the negativity NABI(ρABITA) increases with F but decreases with the variable y, while the variation of the negativity NBIBII(ρBIBIITBI) is opposite to that of the negativity NABI(ρABITA). We also study the von Neumann entropies S(ρAB I ) and S(ρB I B II ). We find that the S(ρAB I ) increases with variable y but S(ρBIBII) is independent of it. However, both S(ρAB I ) and S(ρB I B II ) first decreases with F and then increases with it. The concurrences C(ρAB I ) and C(ρB I B II ) are also discussed. We find that the former decreases with y while the latter increases with y but both of them first increase with F and then decrease with it.

AB - © 2019, Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature. In this work we analyze the characteristics of quantum entanglement of the Dirac field in noninertial reference frames in the context of a new type pseudo-pure state, which is composed of the Bell states. This will help us to understand the relationship between the relativity and quantum information theory. Some states will be changed from entangled states into separable ones around the critical value F = 1/4, but there is no such a critical value for the variable y related to acceleration a. We find that the negativity NABI(ρABITA) increases with F but decreases with the variable y, while the variation of the negativity NBIBII(ρBIBIITBI) is opposite to that of the negativity NABI(ρABITA). We also study the von Neumann entropies S(ρAB I ) and S(ρB I B II ). We find that the S(ρAB I ) increases with variable y but S(ρBIBII) is independent of it. However, both S(ρAB I ) and S(ρB I B II ) first decreases with F and then increases with it. The concurrences C(ρAB I ) and C(ρB I B II ) are also discussed. We find that the former decreases with y while the latter increases with y but both of them first increase with F and then decrease with it.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85059266991&origin=inward

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U2 - 10.1007/s11467-018-0876-x

DO - 10.1007/s11467-018-0876-x

M3 - Article

JO - Frontiers of Physics

JF - Frontiers of Physics

SN - 2095-0462

ER -