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
The Precision of Parameter Estimation for Dephasing Model Under Squeezed Reservoir
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论文类型:期刊论文
发表时间:2017-04-01
发表刊物:INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
收录刊物:SCIE
卷号:56
期号:4
页面范围:1198-1207
ISSN号:0020-7748
关键字:Quantum Fisher information; Squeezed reservoir; Dephasing
摘要:We study the precision of parameter estimation for dephasing model under squeezed environment. We analytically calculate the dephasing factor gamma (t) and obtain the analytic quantum Fisher information (QFI) for the amplitude parameter alpha and the phase parameter phi. It is shown that the QFI for the amplitude parameter a is invariant in the whole process, while the QFI for the phase parameter phi strongly depends on the reservoir squeezing. It is shown that the QFI can be enhanced for appropriate squeeze parameters r and theta. Finally, we also investigate the effects of temperature on the QFI.