Dynamical Change of Quantum Fisher Information of Cavity-Reservoir Systems

We study the quantum Fisher information（QFI） dynamics of the phase parameter in the enlarged cavityreservoir systems at zero temperature under two situations of large N limit and non-Markovian environment,respectively.We find an important relation that the total quantities of QFI of the cavity and r...

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Bibliographic Details
Published in:Communications in theoretical physics 2016-04, Vol.65 (4), p.453-459
Main Author: 黄江 谢钦
Format: Article
Language:English
Subjects:
Dynamic tests
Dynamical systems
Dynamics
Evolution
Expansion
Fisher信息
Holes
Reservoirs
Theoretical physics
动力学
动态变化
型腔
水库系统
演化过程
量子信息
非马尔科夫
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Summary:We study the quantum Fisher information（QFI） dynamics of the phase parameter in the enlarged cavityreservoir systems at zero temperature under two situations of large N limit and non-Markovian environment,respectively.We find an important relation that the total quantities of QFI of the cavity and reservoir are equal to unit during the dynamical evolution.The lost QFI of the cavity transfers to its corresponding reservoir with the same quantities simultaneously.Moreover,we also find that the detuning parameter and non-Markovian effect are two significant factors to affect the preservation of QFI.
ISSN:0253-6102
1572-9494
DOI:10.1088/0253-6102/65/4/453