Simultaneous amplitude and phase damping of x-p symmetric Gaussian states and their separability

被引：22

作者：

Chen, XY ^{[1
]}

机构：

[1] China Inst Metrol, Lab Quantum Informat, Hangzhou 310018, Peoples R China

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.73.022307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We give the time evolution solution of simultaneous amplitude and phase damping for any continuous variable state. For the simultaneous amplitude and phase damping of two-mode x-p symmetric entangled Gaussian states, two analytical conditions of the separability are given. One is the sufficient condition of separability. The other is the condition of positive partial transpose (PPT) separability where the Peres-Horodecki criterion is applied. Between the two conditions there may exist bound entanglement. The simplest example is the simultaneous amplitude and phase damping of a two-mode squeezed vacuum state. The damped state is non-Gaussian.

引用

页数：5

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