Quantum communication in the presence of a horizon

Su, Daiqin and Ralph, T. C. (2014) Quantum communication in the presence of a horizon. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90 8: 084022-1-084022-8. doi:10.1103/PhysRevD.90.084022

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Author Su, Daiqin
Ralph, T. C.
Title Quantum communication in the presence of a horizon
Journal name Physical Review D - Particles, Fields, Gravitation and Cosmology   Check publisher's open access policy
ISSN 1550-2368
1550-7998
Publication date 2014-10-13
Year available 2014
Sub-type Article (original research)
DOI 10.1103/PhysRevD.90.084022
Open Access Status File (Publisher version)
Volume 90
Issue 8
Start page 084022-1
End page 084022-8
Total pages 8
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2015
Language eng
Abstract Based on homodyne detection, we discuss how the presence of an event horizon affects quantum communication between an inertial partner, Alice, and a uniformly accelerated partner, Rob. We show that there exists a low frequency cutoff for Rob’s homodyne detector that maximizes the signal to noise ratio and it approximately corresponds to the Unruh frequency. In addition, the low frequency cutoff which minimizes the conditional variance between Alice’s input state and Rob’s output state is also approximately equal to the Unruh frequency. Thus the Unruh frequency provides a natural low frequency cutoff in order to optimize quantum communication of both classical and quantum information between Alice and Rob.
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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