Entanglement entropy growth in stochastic conformal field theory and the KPZ class

Entanglement entropy growth in stochastic conformal field theory and the KPZ class
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随机共形场理论和 KPZ 类中的纠缠熵增长

DOI:
10.1209/0295-5075/131/10007
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发表时间:
2019
期刊:
Europhysics Letters
影响因子:
--
通讯作者:
P. Le Doussal
P. Le Doussal
中科院分区:
--
文献类型:
--
作者:
D. Bernard;P. Le Doussal

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引入了一个耦合随机噪声的一维有效共形量子场论模型,其中可以观察到Kardar-Parisi-Zhang(KPZ)类涨落。标度算子的量子动力学分析归结为随机环境中随机轨道的研究,由布朗向量场建模。我们使用最近的随机环境中的随机行走的结果来计算时间依赖的纠缠熵的子系统的间隔,从一个因式分解状态。我们发现,在大偏差制度的熵的波动是由普适的Tracy-Widom分布。这将先前在随机电路模型中观察到的KPZ类扩大到一个相互作用的多体量子系统家族。
We introduce a model of effective conformal quantum field theory in dimension coupled to stochastic noise, where Kardar-Parisi-Zhang (KPZ) class fluctuations can be observed. The analysis of the quantum dynamics of the scaling operators reduces to the study of random trajectories in a random environment, modeled by Brownian vector fields. We use recent results on random walks in random environments to calculate the time-dependent entanglement entropy of a subsystem interval, starting from a factorized state. We find that the fluctuations of the entropy in the large deviation regime are governed by the universal Tracy-Widom distribution. This enlarges the KPZ class, previously observed in random circuit models, to a family of interacting many-body quantum systems.
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影响因子: --
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