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arXiv 1402.7084cond-mat.stat-mech
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相互作用量子系统中具有全局效应的局域猝灭

Local quenches with global effects in interacting quantum systems

E. J. Torres-Herrera, Lea F. Santos

摘要:

我们研究了一维晶格的相互作用的自旋-1/2,并表明淬火的局部磁场施加到一个单一的网站的晶格的振幅的影响可以媲美的全球性的扰动瞬间施加到整个系统的影响。这两种猝灭都将系统带到混沌域,初始状态的能量分布接近Breit-Wigner形状,保真度(Loschirton回声)呈指数衰减,热化变得可行。

英文摘要:

We study one-dimensional lattices of interacting spins-1/2 and show that the effects of quenching the amplitude of a local magnetic field applied to a single site of the lattice can be comparable to the effects of a global perturbation applied instantaneously to the entire system. Both quenches take the system to the chaotic domain, the energy distribution of the initial states approaches a Breit-Wigner shape, the fidelity (Loschmidt echo) decays exponentially, and thermalization becomes viable.

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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