Probing Planckian physics in de Sitter space with quantum correlations

Feng, Jun, Zhang, Yao-Zhong, Gould, Mark D., Fan, Heng, Sun, Cheng-Yi and Yang, Wen-Li (2014) Probing Planckian physics in de Sitter space with quantum correlations. Annals of Physics, 351 872-899. doi:10.1016/j.aop.2014.10.014

Author Feng, Jun
Zhang, Yao-Zhong
Gould, Mark D.
Fan, Heng
Sun, Cheng-Yi
Yang, Wen-Li
Title Probing Planckian physics in de Sitter space with quantum correlations
Journal name Annals of Physics   Check publisher's open access policy
ISSN 1096-035X
Publication date 2014-12-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.aop.2014.10.014
Open Access Status
Volume 351
Start page 872
End page 899
Total pages 28
Place of publication Maryland Heights MO, United States
Publisher Academic Press
Collection year 2015
Language eng
Formatted abstract
We study the quantum correlation and quantum communication channel of both free scalar and fermionic fields in de Sitter space, while the Planckian modification presented by the choice of a particular αα-vacuum has been considered. We show the occurrence of degradation of quantum entanglement between field modes for an inertial observer in curved space, due to the radiation associated with its cosmological horizon. Comparing with standard Bunch–Davies choice, the possible Planckian physics causes some extra decrement on the quantum correlation, which may provide the means to detect quantum gravitational effects via quantum information methodology in future. Beyond single-mode approximation, we construct proper Unruh modes admitting general αα-vacua, and find a convergent feature of both bosonic and fermionic entanglements. In particular, we show that the convergent points of fermionic entanglement negativity are dependent on the choice of α. Moreover, an one-to-one correspondence between convergent pointsHc of negativity and zeros of quantum capacity of quantum channels in de Sitter space has been proved.
Keyword De Sitter space
Quantum entanglement
Quantum communication channel
Classical and quantum capacity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
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