\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathcal{P}\mathcal{T}$$\end{document}-symmetry-breaking induced suppr
\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathcal{P}\mathcal{T}$$\end{document}-symmetry-breaking induced suppr
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DOI：
10.1140/epjd/e2014-50188-1
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发表时间：
2014-07
期刊：
影响因子：
--
通讯作者：
X. Lian;Honghua Zhong;Qiongtao Xie;Xiaoqing Zhou;Yunwen Wu;W. Liao
中科院分区：
文献类型：
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作者：
X. Lian;Honghua Zhong;Qiongtao Xie;Xiaoqing Zhou;Yunwen Wu;W. Liao
研究了周期驱动对称非厄米二能级系统的宇称时间对称性对量子隧穿动力学的影响。我们发现，与由对称性破缺引起的厄米情况相比，两能级间的量子隧穿在很宽的参数范围内都能被抑制。采用高频Floquet方法，对自发对称性破缺跃迁的参量依赖性进行了解析和数值研究。结果表明，我们可以通过调节驱动的振幅和频率来操纵这种对称性。我们的研究结果提供了一个很有前途的方法来操纵thesymmetry通过施加一个周期性的驱动场。
We investigate the effect of parity-time () symmetry on quantum tunneling dynamics for a periodically driven-symmetric non-Hermitian two-level system. We find that the quantum tunneling between two levels can be suppressed in a wide range of parameters in comparison with the Hermitian case, which is caused by the-symmetry-breaking. By employing the high-frequency Floquet approach, the parametric dependence of the spontaneous-symmetry-breaking transition is analytically and numerically explored. It is revealed that we can manipulate thesymmetry by tuning the driving amplitude and frequency. Our results provide a promising approach for manipulating thesymmetry by applying a periodic driving field.