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

页数：6

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