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arXiv 1206.4787cond-mat.dis-nncond-mat.stat-mech
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无序自旋链的弛豫动力学:局域化和Stationary State的存在性

Relaxation Dynamics of Disordered Spin Chains: Localization and the Existence of a Stationary State

Simone Ziraldo, Alessandro Silva, Giuseppe E. Santoro

摘要:

我们研究了无序自旋链在哈密顿量突然猝灭后的幺正弛豫动力学。我们给出了分析参数,具体的数值例子证实,表明一个稳定状态的存在取决于最终的哈密顿量的光谱和本地化特性,而不是初始状态。我们测试这些想法的可积一维模型的伊辛或XY类,但更普遍地认为他们的有效性更复杂(nonintegrable)的模型。

英文摘要:

We study the unitary relaxation dynamics of disordered spin chains following a sudden quench of the Hamiltonian. We give analytical arguments, corroborated by specific numerical examples, to show that the existence of a stationary state depends crucially on the spectral and localization properties of the final Hamiltonian, and not on the initial state. We test these ideas on integrable one-dimensional models of the Ising or XY class, but argue more generally on their validity for more complex (nonintegrable) models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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