Quantum speed limit time of a non-Hermitian two-level system

被引：12
|
作者：
Wang, Yan-Yi [1 ,2 ]
Fang, Mao-Fa [1 ,2 ]
机构：
[1] Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Sch Phys & Elect, Changsha 410081, Peoples R China
[2] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Sch Phys & Elect, Minist Educ, Changsha 410081, Peoples R China
来源：
CHINESE PHYSICS B | 2020年 / 29卷 / 03期
关键词：
quantum speed limit time; non-Hermitian dynamics; quantum optics;
D O I：
10.1088/1674-1056/ab6c45
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigated the quantum speed limit time of a non-Hermitian two-level system for which gain and loss of energy or amplitude are present. Our results show that, with respect to two distinguishable states of the non-Hermitian system, the evolutionary time does not have a nonzero lower bound. The quantum evolution of the system can be effectively accelerated by adjusting the non-Hermitian parameter, as well as the quantum speed limit time can be arbitrarily small even be zero.
引用
收藏
页数：6
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