Relative entropy as a measure of entanglement for Gaussian states

• 来源期刊: 中国物理（英文版）
• 关键词: relative entropy entanglement Gaussian states
• 年，卷（期）: 2006,（9）
• 页码范围: 1914-1918
• 页数: 5页
• 语种: 英文

摘要

In this paper, we derive an explicit analytic expression of the relative entropy between two general Gaussian states. In the restriction of the set for Gaussian states and with the help of relative entropy formula and Peres-Simon separability criterion, one can conveniently obtain the relative entropy entanglement for Gaussian states. As an example,the relative entanglement for a two-mode squeezed thermal state has been obtained.