论文标题
相互作用的自旋链中的热准颗粒的异常运输
Anomalous transport from hot quasiparticles in interacting spin chains
论文作者
论文摘要
许多与实验相关的量子自旋链近似可集成，并支持长寿命的准颗粒激发。量子磁性集成模型的一个规范示例是XXZ自旋链，能量在弹道上传播，但令人惊讶的是，高温自旋传输可能是扩散的或超级延伸的。我们使用直观的准粒子图片回顾了该模型的运输特性，该图片依赖于最近引入的广义流体动力学框架。我们讨论如何从可集成和近乎整合限制的准粒子层次结构中出现异常线性响应特性，并重点是流体动力波动的作用。我们还评论了最近的发展，包括非线性响应，全计统计和远程均衡运输。我们概述了XXZ旋转链中传输的最新数值和实验结果。
Many experimentally relevant quantum spin chains are approximately integrable, and support long-lived quasiparticle excitations. A canonical example of integrable model of quantum magnetism is the XXZ spin chain, for which energy spreads ballistically, but, surprisingly, high-temperature spin transport can be diffusive or superdiffusive. We review the transport properties of this model using an intuitive quasiparticle picture that relies on the recently introduced framework of generalized hydrodynamics. We discuss how anomalous linear response properties emerge from hierarchies of quasiparticles both in integrable and near-integrable limits, with an emphasis on the role of hydrodynamic fluctuations. We also comment on recent developments including non-linear response, full-counting statistics and far-from-equilibrium transport. We provide an overview of recent numerical and experimental results on transport in XXZ spin chains.
