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arXiv 1606.04542cond-mat.dis-nncond-mat.stat-mech
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长程跳跃和相互作用对纠缠动力学和多体局域化的影响

Effect of long-range hopping and interactions on entanglement dynamics and many-body localization

Rajeev Singh, Roderich Moessner, Dibyendu Roy

摘要:

我们数值研究了具有非随机但长程跳跃和相互作用的无自旋费米子链中的纠缠动力学,以及随机的在位能量。对于中度无序的相互作用的情况下,链主机离域状态在顶部的频带进行离域本地化的过渡,随着无序度的增加。我们发现一个有趣的制度,在这个非相互作用的无序链的长时间纠缠熵的尺度为$S(t) \sim \ln t$和饱和纠缠熵的尺度与系统大小$L$为$S(L,t \to {\infty}) \sim \ln L$。我们进一步研究了长程跳跃和相互作用对纠缠增长和多体局域化(MBL)跃迁的影响。我们开发了一个类比高维短程系统比较和对比这种行为与物理的MBL在一个更高的维度。

英文摘要:

We numerically investigate the dynamics of entanglement in a chain of spinless fermions with nonrandom but long-range hopping and interactions, and with random on-site energies. For moderate disorder in the absence of interactions, the chain hosts delocalized states at the top of the band which undergo a delocalization-localization transition with increasing disorder. We find an interesting regime in this noninteracting disordered chain where the long-time entanglement entropy scales as $S(t) \sim \ln t$ and the saturated entanglement entropy scales with system size $L$ as $S(L,t \to {\infty}) \sim \ln L$. We further study the interplay of long-range hopping and interactions on the growth of entanglement and the many-body localization (MBL) transition in this system. We develop an analogy to higher-dimensional short-range systems to compare and contrast such behavior with the physics of MBL in a higher dimension.

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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