arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2204.06017cond-mat.dis-nncond-mat.stat-mechcond-mat.str-elquant-ph
收藏

关联无序下的多体局域化跃迁

Many body localization transition with correlated disorder

Zhengyan Darius Shi, Vedika Khemani, Romain Vasseur, Sarang Gopalakrishnan

摘要:

研究了一维空间关联无序系统中多体局域化(MBL)相变的临界性质。我们考虑一个一般的家庭的无序模型,参数化的无序耦合的波动有多强时,粗粒度的大小$\ell$的区域。对于不相关的随机性,这些波动的特征尺度是$\sqrt{\ell}$ ;更一般地,它们的尺度是$\ell^γ$。我们讨论了正相关的疾病($1/2 < γ< 1$)和非正相关的,或“超均匀”的疾病($γ< 1/2$)。我们认为,在混乱的关系通常是无关的MBL过渡。此外,假设MBL跃迁由Morningstar \emph{et al.} [Phys. Rev. B 102,125134,(2020)]最近发展的重整化群方案描述,我们认为即使是正相关无序也会使临界理论保持不变,尽管它修改了多体局域相的某些性质。

英文摘要:

We address the critical properties of the many-body localization (MBL) phase transition in one-dimensional systems subject to spatially correlated disorder. We consider a general family of disorder models, parameterized by how strong the fluctuations of the disordered couplings are when coarse-grained over a region of size $\ell$. For uncorrelated randomness, the characteristic scale for these fluctuations is $\sqrt{\ell}$; more generally they scale as $\ell^γ$. We discuss both positively correlated disorder ($1/2 < γ< 1$) and anticorrelated, or "hyperuniform," disorder ($γ< 1/2$). We argue that anticorrelations in the disorder are generally irrelevant at the MBL transition. Moreover, assuming the MBL transition is described by the recently developed renormalization-group scheme of Morningstar \emph{et al.} [Phys. Rev. B 102, 125134, (2020)], we argue that even positively correlated disorder leaves the critical theory unchanged, although it modifies certain properties of the many-body localized phase.

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。

↑