可积淬火的大尺度动力学
Large-scale dynamics of integrable quenches
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中文总结 AI 辅助
本文扩展弹道宏观涨落理论至可积淬火问题,通过路径积分和鞍点求解守恒荷全计数统计的动力学,在自由费米子和规则54系统中验证了精确结果,并补全了弹道窗口解。
中文摘要 AI 辅助
弹道宏观涨落理论(BMFT)是一种基于路径积分的方法,用于处理相互作用可积系统中的大尺度关联,迄今为止仅应用于准平衡设置。在本文中,我们将该方法扩展到可积淬火问题,并为了说明,我们计算了守恒荷的全计数统计(FCS)的时间演化。我们确定了相关的路径积分,通过鞍点求解,并获得描述FCS动力学的一组偏微分方程。我们显式地求解了自由费米子系统和相互作用元胞自动机规则54的这些方程。在这两种情况下,我们都恢复了已知的精确结果。对于规则54,我们的构造还完成了整个弹道窗口内的解。
英文摘要
The Ballistic Macroscopic Fluctuation Theory (BMFT) is a path-integral based approach to treat large-scale correlations in interacting integrable systems which, so far, has only been applied to quasi-equilibrium settings. In this paper we extend this approach to integrable quench problems and, to illustrate it, we compute the time evolution of the full-counting-statistics (FCS) of a conserved charge. We identify the relevant path integral, solve it via saddle-point, and obtain a set of partial differential equations describing the dynamics of the FCS. We solve these equations explicitly for free fermionic systems and for the interacting cellular automaton Rule 54. In both cases, we recover the known exact results. For Rule 54, our construction moreover completes the solution across the entire ballistic window.
发表机构
- School of Physics and Astronomy, University of Birmingham(伯明翰大学物理与天文学学院)
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