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arXiv 1802.02525cond-mat.dis-nn
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自旋-电荷分离与多体局域化

Spin-charge separation and many-body localization

Jakub Zakrzewski, Dominique Delande

摘要:

研究了自旋为1/2的费米子无序链的多体局域化。在[Phys. Rev. B \textbf{94},241104(2016)]中,当向下和向上分量都暴露于相同的强无序时,作者观察到纠缠熵的幂律增长,这表明多体局域化是不完整的;密度(电荷)自由度是局域化的,而自旋自由度显然是离域的。我们发现,这种权力的行为只是一个短暂的影响,并在较长的时间,增长是对数的时间表明自旋自由度也本地化,使系统遵循标准的多体局域化的情况。我们还研究了实验相关的情况下,准周期性障碍。

英文摘要:

We study many-body localization for a disordered chain of spin 1/2 fermions. In [Phys. Rev. B \textbf{94}, 241104 (2016)], when both down and up components are exposed to the same strong disorder, the authors observe a power law growth of the entanglement entropy that suggests that many-body localization is not complete; the density (charge) degree of freedom is localized, while the spin degree of freedom is apparently delocalized. We show that this power-like behavior is only a transient effect and that, for longer times, the growth is logarithmic in time suggesting that the spin degree of freedom is also localized, so that the system follows the standard many-body localization scenario. We also study the experimentally relevant case of quasiperiodic disorder.

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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