4.4 Article

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

期刊

JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 3, 页码 -

出版社

SPRINGER
DOI: 10.1007/JHEP03(2021)146

关键词

Conformal Field Theory; AdS-CFT Correspondence

资金

  1. JSPS fellowship
  2. Simons Investigator Grant from the Simons Foundation

向作者/读者索取更多资源

The study investigates the dynamics of various entanglement measures in quantum systems after exciting the ground state, revealing a close-knit structure among them that strongly depends on the chaoticity of the theory. Evidence is found for breakdown of the quasi-particle picture in 2D conformal field theories and universality of entanglement dynamics in non-equilibrium systems.
We study the dynamics of (Renyi) mutual information, logarithmic negativity, and (Renyi) 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.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据