Acceleration-assisted entanglement harvesting and rangefinding

Salton, G, Mann, R and Menicucci, N 2015, 'Acceleration-assisted entanglement harvesting and rangefinding', New Journal of Physics, vol. 17, pp. 1-20.


Document type: Journal Article
Collection: Journal Articles

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Title Acceleration-assisted entanglement harvesting and rangefinding
Author(s) Salton, G
Mann, R
Menicucci, N
Year 2015
Journal name New Journal of Physics
Volume number 17
Start page 1
End page 20
Total pages 20
Publisher Institute of Physics Publishing
Abstract We study entanglement harvested from a quantum field through local interaction with Unruh-DeWitt detectors undergoing linear acceleration. The interactions allow entanglement to be swapped locally from the field to the detectors. We find an enhancement in the entanglement harvesting by two detectors with anti-parallel acceleration over those with inertialmotion. This enhancement is characterized by the presence of entanglement between two detectors that would otherwise maintain a separable state in the absence of relativistic motion (with the same distance of closest approach in both cases). We also find that entanglement harvesting is degraded for two detectors undergoing parallel acceleration in the same way as for two static, comoving detectors in a de Sitter universe. This degradation is known to be different from that of two inertial detectors in a thermal bath. We comment on the physical origin of the harvested entanglement and present three methods for determining distance between two detectors using properties of the harvested entanglement. Information about the separation is stored nonlocally in the joint state of the accelerated detectors after the interaction; a single detector alone contains none. We also find an example of entanglement sudden death exhibited in parameter space.
Subject Quantum Information, Computation and Communication
Field Theory and String Theory
Keyword(s) Entanglement harvesting
Quantum field theory
Unruh effect
DOI - identifier 10.1088/1367-2630/17/3/035001
Copyright notice © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
ISSN 1367-2630
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