The Heisenberg Model after an Interaction Quench

In accordance with the recent experimental progress of the controllable spin-spin interactions, the Heisenberg model after an interaction quench is discussed. The Hamiltonian of the system out of equilibrium is introduced and treated by the flow equation method. As a result, the spectrum and zero-po...

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Bibliographic Details
Published in:Chinese physics letters 2014-10, Vol.31 (10), p.14-17
Main Author: 周宗立 黎珉 叶剑 李东鹏 娄平 章国顺
Format: Article
Language:English
Subjects:
交互
哈密顿
实验方案
振荡行为
流动方程
海森堡模型
淬火
自旋相互作用
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Summary:In accordance with the recent experimental progress of the controllable spin-spin interactions, the Heisenberg model after an interaction quench is discussed. The Hamiltonian of the system out of equilibrium is introduced and treated by the flow equation method. As a result, the spectrum and zero-point spin deviation are obtained with the help of time-evolved operators. Additionally, other methods are applied to verify the results in mathematics. It is found that the observables show an oscillating behavior. The feasible experimental scheme of the concerned scenario is also mentioned.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/10/100502