Cooling atom-cavity systems into entangled states

被引：54

作者：

Busch, J. ^{[1
]}

De, S. ^{[1
]}

Ivanov, S. S. ^{[1
,2
]}

Torosov, B. T. ^{[1
,2
]}

Spiller, T. P. ^{[1
]}

Beige, A. ^{[1
]}

机构：

[1] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[2] Univ Sofia, Dept Phys, Sofia 1164, Bulgaria

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

DECOHERENCE;

D O I：

10.1103/PhysRevA.84.022316

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Generating entanglement by simply cooling a system into a stationary state which is highly entangled has many advantages. Schemes based on this idea are robust against parameter fluctuations, tolerate relatively large spontaneous decay rates, and achieve high fidelities independent of their initial state. A possible implementation of this idea in atom-cavity systems has recently been proposed by Kastoryano et al., [Kastoryano et al., Phys. Rev. Lett. 106, 090502 (2011)]. Here we propose an improved entanglement cooling scheme for two atoms inside an optical cavity which achieves higher fidelities for comparable single-atom cooperativity parameters C. For example, we predict fidelities above 90% even for C as low as 20 without having to detect photons.

引用

页数：11

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