System-environment dynamics of X-type states in noninertial frames

Wang, Jieci; Jing, Jiliang

doi:10.1016/j.aop.2011.10.002

Cited by 24 publications

(12 citation statements)

References 41 publications

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“…Moreover, the entanglement is quantified by the Wootters’ concurrence. For the X -type structures of the density matrix, we have a simpler expression 19 46 …”

Section: Methodsmentioning

confidence: 99%

Entanglement revive and information flow within the decoherent environment

Shi

Wang

Liu

2016

Sci Rep

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In this paper, the dynamics of entanglement is investigated in the presence of a noisy environment. We reveal its revival behavior and probe the mechanisms of this behavior via an information-theoretic approach. By analyzing the correlation distribution and the information flow within the composite system including the qubit subsystem and a noisy environment, it has been found that the subsystem-environment coupling can induce the quasi-periodic entanglement revival. Furthermore, the dynamical relationship among tripartite correlations, bipartite entanglement and local state information is explored, which provides a new insight into the non-Markovian mechanisms during the evolution.

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“…Moreover, the entanglement is quantified by the Wootters’ concurrence. For the X -type structures of the density matrix, we have a simpler expression 19 46 …”

Section: Methodsmentioning

confidence: 99%

Entanglement revive and information flow within the decoherent environment

Shi

Wang

Liu

2016

Sci Rep

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“…On the other hand, the nonlocality is inextricably and quantitatively linked to uncertainty [38] and can be determined uniquely by it. Consequently, the entropic uncertainty bound derived in (10) (18) could determine the nonlocality of the system [39]. Generalized to a dynamic spacetime (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…This phenomenon is essentially different from that reported in [16] where entanglement transfers between the quantum system and its environment. In our scenario, all field modes beyond Bob's acceleration horizon have to be abandoned, therefore the quantum information is completely damaged [18,19].…”

Section: Introductionmentioning

confidence: 99%

Entropic uncertainty relations under the relativistic motion

et al. 2013

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The uncertainty principle bounds our ability to simultaneously predict two incompatible observables of a quantum particle. Assisted by a quantum memory to store the particle, this uncertainty could be reduced and quantified by a new Entropic Uncertainty Relation (EUR). In this Letter, we explore how the relativistic motion of the system would affect the EUR in two sample scenarios. First, we show that the Unruh effect of an accelerating particle would surely increase the uncertainty if the system and particle entangled initially. On the other hand, the entanglement could be generated from nonuniform motion once the Unruh decoherence is prevented by utilizing the cavity. We show that, in a uncertainty game between an inertial cavity and a nonuniformly accelerated one, the uncertainty evolves periodically with respect to the duration of acceleration segment. Therefore, with properly chosen cavity parameters, the uncertainty bound could be protected. Implications of our results for gravitation are also discussed.Comment: 7 pages, 3 figure

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“…The subject have attracted much attention during recent years [72][73][74][75][76][77][78][79][80]. It has also been investigated under decoherence for bipartite [81][82][83][84][85], qubit-qutrit [86] and multipartite [87] systems. The entanglement dynamics for noninertial observers in a correlated environment is considered in Ref.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of multipartite quantum correlations under decoherence

Ramzan

2012

Preprint

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Quantum discord is an optimal resource for the quantification of classical and non-classical correlations as compared to other related measures. Geometric measure of quantum discord is another measure of quantum correlations. Recently, the geometric quantum discord for multipartite states has been introduced by Jianwei Xu [arxiv:quant/ph.1205.0330].Motivated from the recent study [Ann. Phys. 327 (2012) 851] for the bipartite systems, I have investigated global quantum discord (QD) and geometric quantum discord (GQD) under the influence of external environments for different multipartite states. Werner-GHZ type three-qubit and six-qubit states are considered in inertial and non-inertial settings.The dynamics of QD and GQD is investigated under amplitude damping, phase damping, depolarizing and flipping channels. It is seen that the quantum discord vanishes for p > 0.75 in case of three-qubit GHZ states and for p > 0.5 for six qubit GHZ states. This implies that multipartite states are more fragile to decoherence for higher values of N . Surprisingly, a rapid sudden death of discord occurs in case of phase flip channel. However, for bit flip channel, no sudden death happens for the six-qubit states. On the other hand, depolarizing channel heavily influences the QD and GQD as compared to the amplitude damping channel. It means that the depolarizing channel has the most destructive influence on the discords for multipartite states. From the perspective of accelerated observers, it is seen that effect of environment on QD and GQD is much stronger than that of the acceleration of non-inertial frames. The degradation of QD and GQD happens due to Unruh effect. Furthermore, QD exhibits more robustness than GQD when the multipartite systems are exposed to environment.

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System-environment dynamics of X-type states in noninertial frames

Cited by 24 publications

References 41 publications

Entanglement revive and information flow within the decoherent environment

Entanglement revive and information flow within the decoherent environment

Entropic uncertainty relations under the relativistic motion

Dynamics of multipartite quantum correlations under decoherence

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