Information propagation in the one-dimensional infinite temperature Hubbard model with a dissipative particle sink at the end of a semi-infinite chain is studied. In the strongly interacting limit, the two-site mutual information and the operator entanglement entropy exhibit a rich structure with two propagating information fronts and superimposed interference fringes. A classical reversible cellular automaton model quantitatively captures the transport and the slow, classical part of the correlations but fails to describe the rapidly propagating information jet. The fast quantum jet resembles coherent free particle propagation, with the accompanying long-ranged interference fringes that are exponentially damped by short-ranged spin correlations in the many-body background.

中文翻译：

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无限温度哈伯德链中的损耗诱导量子信息射流


研究了一维无限温度哈伯德模型中的信息传播，该模型在半无限链的末端有一个耗散粒子汇。在强交互极限下，双站点互信息和算子纠缠熵表现出丰富的结构，具有两个传播信息前沿和叠加的干涉条纹。经典的可逆元胞自动机模型定量地捕获了相关性的传输和缓慢的经典部分，但无法描述快速传播的信息射流。快速量子射流类似于相干自由粒子传播，伴随着长程干涉条纹，这些条纹被多体背景中的短程自旋相关性呈指数衰减。