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arXiv 2109.06196cond-mat.dis-nncond-mat.quant-gascond-mat.str-el
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斯塔克多体定域系统的输运

Transport in Stark Many Body Localized Systems

Guy Zisling, Dante M. Kennes, Yevgeny Bar Lev

摘要:

使用数值精确的方法,我们研究了相互作用的自旋链中的运输足够强的空间恒定的电场预计将经历斯塔克多体局域化。我们表明,从一个通用的初始状态,自旋激发保持本地化只有到一个有限的离域时间,这取决于指数系统的大小和电场的强度。这表明,真正的斯塔克多体局域化只发生在热力学极限。我们还表明,在一个有限的系统和电场强于相互作用强度的瞬态本地化可以很好地近似由一个马格努斯扩展到倍的增长与电场强度。

英文摘要:

Using numerically exact methods we study transport in an interacting spin chain which for sufficiently strong spatially constant electric field is expected to experience Stark many-body localization. We show that starting from a generic initial state, a spin-excitation remains localized only up to a finite delocalization time, which depends exponentially on the size of the system and the strength of the electric field. This suggests that bona fide Stark many-body localization occurs only in the thermodynamic limit. We also demonstrate that the transient localization in a finite system and for electric fields stronger than the interaction strength can be well approximated by a Magnus expansion up-to times which grow with the electric field strength.

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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