The enhancement of quantum entanglement under an open Dirac system with the Hawking effect in Schwarzschild space-time

In this letter, we mainly investigate how to enhance the damaged quantum entanglement under an open Dirac system with the Hawking effect within Schwarzschild space-time. We consider that particle A held by Alice undergoes generalized amplitude damping noise in a flat space-time, and that another par...

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Bibliographic Details
Published in:Laser physics letters 2018-06, Vol.15 (6), p.65210
Main Authors: Sun, Wen-Yang, Wang, Dong, Fang, Bao-Long, Shi, Jia-Dong, Ye, Liu
Format: Article
Language:English
Subjects:
decoherence
Hawking effect
quantum entanglement
Schwarzschild space-time
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Summary:In this letter, we mainly investigate how to enhance the damaged quantum entanglement under an open Dirac system with the Hawking effect within Schwarzschild space-time. We consider that particle A held by Alice undergoes generalized amplitude damping noise in a flat space-time, and that another particle B by Bob entangled with A is under a Schwarzschild space-time. Subsequently, we put forward a physical scheme to recover the damaged quantum entanglement by prior weak measurement on subsystem A before the interaction with the decoherence noise followed by post-measurement filtering operation. The results indicate that our scheme can effectively recover the damaged quantum entanglement affected by the Hawking effect and the noisy channel. Thus, our work might be beneficial to understand the dynamic behavior of the quantum state and recover the damaged quantum entanglement with open Dirac systems under the Hawking effect in the background of a Schwarzschild black hole.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-202X/aab69c