于长水
个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:物理学院党委书记
其他任职:无
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:物理学院
学科:理论物理
办公地点:313
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A tight bound on negativity of superpositions
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论文类型:期刊论文
发表时间:2010-08-01
发表刊物:EUROPEAN PHYSICAL JOURNAL D
收录刊物:SCIE
卷号:59
期号:2
页面范围:317-320
ISSN号:1434-6060
摘要:By a variational definition of the entanglement measure - negativity, we derive an upper bound of negativity of superpositions in terms of the negativities of the quantum states being superposed. It is shown that the upper bound has a simple formulation. In particular, in many cases the upper bound is tighter than the previous bounds.