Dynamical Evolution of an Effective Two-Level System with ${\mathscr{P}}{\mathscr{T}}$ Symmetry

Autor:	Liping Guo, Zhihao Xu, Lei Du, Chuanhao Yin
Rok vydání:	2018
Předmět:	Physics Quantum mechanics 0103 physical sciences Symmetric model General Physics and Astronomy Parity (physics) Relative phase Symmetry breaking Fixed point 010306 general physics 01 natural sciences Hermitian matrix 010305 fluids & plasmas
Zdroj:	Chinese Physics Letters. 35:050301
ISSN:	1741-3540 0256-307X
DOI:	10.1088/0256-307x/35/5/050301
Popis:	We investigate the dynamics of parity- and time-reversal 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 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 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 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 symmetry. It helps to study the dynamic behavior of the complex symmetric model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::75bd5118e9cabe9400a9370776785bbc https://doi.org/10.1088/0256-307x/35/5/050301 Zobrazit plný text záznamu