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arXiv 2604.05850cond-mat.stat-mechquant-ph
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自由费米子在广泛电荷监测下的广义流体动力学

Generalized hydrodynamics of free fermions under extensive-charge monitoring

Dipartimento di Fisica e Astronomia, Università di Bologna and INFN, Sezione di Bologna(博洛尼亚大学物理与天文学系及意大利国家核物理研究所博洛尼亚分部)

Pablo Bayona-Pena, Michele Mazzoni, Lorenzo Piroli

AI总结:

研究自由费米子在广泛区域外监测守恒电荷的输运动力学,通过双分区协议分析局部电荷和电流在流体动力学尺度的分布,提出基于广义流体动力学(GHD)的混合数值-解析框架,展示领域墙初始态下监测导致的不连续性及零点极限下的无输运现象。

摘要:

我们研究自由费米子在广泛区域外监测守恒电荷的输运动力学。聚焦双分区协议,考虑在系统一半区域监测总粒子数,并研究在流体动力学尺度下的局部电荷和电流分布。尽管描述平均动力学的李纳布兰达算子是非局部的,但我们表明这些分布可以基于局部杂质来理解。我们提出一个基于广义流体动力学(GHD)图景的一般框架,允许在流体动力学尺度上混合数值-解析求解淬火动力学。我们以领域墙初始态为例,展示监测导致分布不连续性,随着监测速率增加而更加显著,并在无限监测速率的泽诺极限下导致无输运。我们的GHD框架可自然扩展到相互作用系统,为受广泛电荷测量影响的可积模型输运研究开辟道路。

英文摘要:

We study transport dynamics of free fermions subject to the external monitoring of a conserved charge over an extensive region. Focusing on bipartition protocols, we consider monitoring the total particle number over half of the system, and study the profiles of local charges and currents at hydrodynamic scales. While the Lindbladian describing the averaged dynamics is non-local, we show that the profiles can be understood in terms of localized impurities. We present a general framework based on the generalized hydrodynamics (GHD) picture, allowing for a hybrid numerical-analytic solution of the quench dynamics at hydrodynamic scales. We illustrate our approach for domain-wall initial states, showing that monitoring leads to discontinuities in the profiles that become more pronounced as the rate increases and that lead to the absence of transport in the Zeno limit of infinite monitoring rates. Our GHD framework could be naturally extended to interacting systems, paving the way for a systematic study of transport of integrable models subject to extensive-charge measurements.

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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