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arXiv 1701.04827cond-mat.dis-nncond-mat.quant-gascond-mat.str-el
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多体局域化跃迁纠缠的标度理论

Scaling Theory of Entanglement at the Many-Body Localization Transition

Philipp T. Dumitrescu, Romain Vasseur, Andrew C. Potter

摘要:

研究了多体定域相和热相跃迁过程中本征态纠缠熵的普适性质。我们开发了一种改进的实空间重整化群方法,使大系统尺寸的数值模拟和系统的外推到无限大的系统尺寸限制。对于小于关联长度的系统,平均纠缠遵循亚热体积定律,其系数是一个普适的标度函数。此外,纠缠的全分布遵循一个普遍的标度形式,并表现出双峰结构,产生普遍的次主导的幂律修正主导的体积定律。对于大于相关长度的系统,短间隔纠缠表现出一个不连续的跳跃跨越过渡从完全热体积定律的热侧,一个纯面积定律的MBL侧。

英文摘要:

We study the universal properties of eigenstate entanglement entropy across the transition between many-body localized (MBL) and thermal phases. We develop an improved real space renormalization group approach that enables numerical simulation of large system sizes and systematic extrapolation to the infinite system size limit. For systems smaller than the correlation length, the average entanglement follows a sub-thermal volume law, whose coefficient is a universal scaling function. Furthermore, the full distribution of entanglement follows a universal scaling form, and exhibits a bimodal structure that produces universal subleading power-law corrections to the leading volume-law. For systems larger than the correlation length, the short interval entanglement exhibits a discontinuous jump across the transition from fully thermal volume-law on the thermal side, to a pure area-law on the MBL side.

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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