Pseudo-parity-time symmetry in periodically high-frequency driven systems: perturbative analysis

被引：9
|
作者：
Luo, Xiaobing [1 ]
Wu, Donglan [1 ]
Luo, Senping [2 ]
Guo, Yu [3 ]
Yu, Xiaoguang [1 ]
Hu, Qianglin [1 ]
机构：
[1] Jinggangshan Univ, Dept Phys, Jian 343009, Jiangxi, Peoples R China
[2] Wuhan Univ, Sch Math & Stat, Wuhan 430072, Peoples R China
[3] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410114, Hunan, Peoples R China
来源：
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2014年 / 47卷 / 34期
关键词：
parity-time symmetry; multiple-scale asymptotic analysis; periodically driven systems; NON-HERMITIAN HAMILTONIANS;
D O I：
10.1088/1751-8113/47/34/345301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the periodically modulated two-level systems with balanced gain and loss by means of a multiple-scale asymptotic analysis. The pseudo-parity-time symmetry (2013 Phys. Rev. Lett. 110 243902), which is often neglected in exact numerical simulations and totally lost in the commonly used high-frequency averaging approximation, has been fully understood in the framework of the second-order perturbative theory. Our work indicates that the multiple-scale asymptotic expansion method can be used to predict precisely some subtle and important dynamical behaviors in periodically driven systems.
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页数：10
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