首页|Dynamical Evolution of an Effective Two-Level System with PT Symmetry

Dynamical Evolution of an Effective Two-Level System with PT Symmetry

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We investigate the dynamics of parity-and time-reversal (PT) symmetric two-energy-level atoms in the presence of two optical and one radio-frequency fields.The strength and relative phase of fields can drive the system from the unbroken to the broken PT symmetric regions.Compared with the Hermitian model,Rabi-type oscillation is still observed,and the oscillation characteristics are also adjusted by the strength and relative phase in the region of the unbroken PT symmetry.At the exception point,the oscillation breaks down.To better understand the underlying properties we study the effective Bloch dynamics and find that the emergence of the z components of the fixed points is the feature of the PT symmetry breaking and the projections in the x-y plane can be controlled with high flexibility compared with the standard two-level system with the PT symmetry.It helps to study the dynamic behavior of the complex PT symmetric model.

Lei Du、Zhihao Xu、Chuanhao Yin、Liping Guo

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Institute of Theoretical Physics, Shanxi University, Taiyuan 030006

Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006

Institute of Physics, Chinese Academy of Sciences, Beijing 100190

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Supported by the National Natural Science Foundation of China underSupported by the National Natural Science Foundation of China underSupported by the National Natural Science Foundation of China underSupported by the National Natural Science Foundation of China underYouth Science Foundation of Shanxi Province of China underNatural Science Foundation for Youths of Shanxi Province under Grant Nos 201601D201027 and 1331KSC

Grant Nos 11104171114041991157418711604188Grant No 2012021003-1

2018

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDCSCDSCIEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2018.35(5)
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