论文标题

局部淬火后的准粒子图片及其崩溃:互信息,消极和反映的熵

The quasi-particle picture and its breakdown after local quenches: mutual information, negativity, and reflected entropy

论文作者

Kudler-Flam, Jonah, Kusuki, Yuya, Ryu, Shinsei

论文摘要

我们研究(Rényi)相互信息,对数消极情绪的动力学和(Rényi)在激发了当地操作员的基态之后反映了熵。加上参考文献的最新结果。 [1],我们能够猜测在真空上方激发的状态(包括局部和全局量子淬灭)中出现的三个数量之间的紧密联系结构。这种结构密切取决于理论的混乱性,即存在与整合和混乱理论的不同等效集合。对于理性的保形场理论(RCFT),我们找到所有数量来计算插入的主要操作员的量子尺寸。相比之下,我们发现(对数)的相关性措施在所有$ c> 1 $保形场理论中都没有有限的扭曲间隙。在比较两类理论中的计算时,我们能够识别2D共形场理论中准粒子图片分解的动力学机制。有趣的是,我们还发现初步证据表明,我们的一般课程适用于与共同场理论不同的量子系统,例如可整合和混乱的旋转链,这表明非平衡系统中的纠缠动态普遍性。

We study the dynamics of (Rényi) mutual information, logarithmic negativity, and (Rényi) reflected entropy after exciting the ground state by a local operator. Together with recent results from Ref. [1], we are able to conjecture a close-knit structure between the three quantities that emerges in states excited above the vacuum, including both local and global quantum quenches. This structure intimately depends on the chaoticity of the theory i.e. there exist distinct sets of equivalences for integrable and chaotic theories. For rational conformal field theories (RCFT), we find all quantities to compute the quantum dimension of the primary operator inserted. In contrast, we find the correlation measures to grow (logarithmically) without bound in all $c > 1$ conformal field theories with a finite twist gap. In comparing the calculations in the two classes of theories, we are able to identify the dynamical mechanism for the breakdown of the quasi-particle picture in 2D conformal field theories. Intriguingly, we also find preliminary evidence that our general lessons apply to quantum systems considerably distinct from conformal field theories, such as integrable and chaotic spin chains, suggesting a universality of entanglement dynamics in non-equilibrium systems.

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