Protecting Quantum Coherence and Quantum Fisher Information in Ohmic Reservoir

被引：3

作者：

Liu, Xiao-Zhi ^{[1
]}

Long, Dan ^{[2
]}

Zou, Hong-Mei ^{[2
]}

Liu, Rongfang ^{[2
]}

Yang, Jianhe ^{[2
]}

机构：

[1] Changsha Univ, Sch Elect Informat & Elect Engn, Changsha 410003, Peoples R China

[2] Hunan Normal Univ, Sch Phys & Elect, Minist Educ,Synerget Innovat Ctr Quantum Effects, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2020年 / 59卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Quantum coherence; Quantum fisher information; Ohmic reservoir; ENTANGLEMENT;

D O I：

10.1007/s10773-020-04620-z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum coherence(QC) and quantum Fisher information(QFI) are investigated for the atom in Jaynes-Cummings model coupling with the Ohmic reservoir at zero temperature when the total excitation number N = 1. We discuss in detail the influence of the atom-cavity coupling and the reservoir parameters on QC and QFI. The results show that QC and QFI of the atom can be effectively controlled by the atom-cavity coupling and the reservoir parameters. Namely, the larger atom-cavity coupling and the appropriate reservoir parameters can effectively protect QC and QFI. Moreover, QC can improve QFI. Last, we provide a physical explanation using the decoherence rate.

引用

页码：3600 / 3612

页数：13

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