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论文类型： 期刊论文

发表时间： 2008-04-01

发表刊物： INTERNATIONAL JOURNAL OF QUANTUM INFORMATION

收录刊物： SCIE

卷号： 6

期号： 2

页面范围： 403-410

ISSN号： 0219-7499

关键字： measure of entanglement; quantum trajectory approach; master equation

摘要： We propose a measure of entanglement through the quantum trajectory approach. The advantage of this measure is that it can avoid the problem of finding all possible decompositions for mixed states, which is usually complicated. This method can be applied to any physical system whose time evolution is governed by the master equation. As an example, we calculate the entanglement of the following cases: ( A) entangled system composed of a pair of two- level atoms coupling to two separate baths and, ( B) two entangled modes subjected to two separate baths.