Entanglement of a two-particle Gaussian state interacting with a heat bath

被引：13

作者：

Ghesquiere, A. ^{[1
]}

Dorlas, T. ^{[2
]}

机构：

[1] NUI Maynooth, Dept Math Phys, Maynooth, Kildare, Ireland

[2] Dublin Inst Adv Studies, Sch Theoret Phys, Dublin 4, Ireland

来源：

PHYSICS LETTERS A | 2013年 / 377卷 / 40期

关键词：

Entanglement; Gaussian state; Master equation; QUANTUM; EQUATION;

D O I：

10.1016/j.physleta.2013.08.006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effect of a thermal reservoir is investigated on a bipartite Gaussian state. We derive a pre-Lindblad master equation in the non-rotating wave approximation for the system. We then solve the master equation for a bipartite harmonic oscillator Hamiltonian with entangled initial state. We show that for strong damping the loss of entanglement is the same as for freely evolving particles. However, if the damping is small, the entanglement is shown to oscillate and eventually tend to a constant non-zero value. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：2831 / 2839

页数：9

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