Entanglement dynamics for uniformly accelerated two-level atoms

Jiawei Hu and Hongwei Yu
Phys. Rev. A 91, 012327 – Published 21 January 2015

Abstract

We study, in the paradigm of open quantum systems, the entanglement dynamics of two uniformly accelerated atoms with the same acceleration perpendicular to the separation. The two-atom system is treated as an open system coupled with a bath of fluctuating massless scalar fields in the Minkowski vacuum, and the master equation that governs its evolution is derived. It has been found that, for accelerated atoms with a nonvanishing separation, entanglement sudden death is a general feature when the initial state is entangled, while for those in a separable initial state, entanglement sudden birth only happens for atoms with an appropriate interatomic separation and sufficiently small acceleration. Remarkably, accelerated atoms can get entangled in certain circumstances while the inertial ones in the Minkowski vacuum cannot. A comparison between the results of accelerated atoms and those of static ones in a thermal bath shows that uniformly accelerated atoms exhibit features distinct from those immersed in a thermal bath at the Unruh temperature in terms of entanglement dynamics.

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  • Received 30 October 2014

DOI:https://doi.org/10.1103/PhysRevA.91.012327

©2015 American Physical Society

Authors & Affiliations

Jiawei Hu and Hongwei Yu

  • Center for Nonlinear Science and Department of Physics, Ningbo University, Ningbo, Zhejiang 315211, China

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Vol. 91, Iss. 1 — January 2015

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