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
收藏
页码：3600 / 3612
页数：13
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