论文标题
通过纠缠镜头观察准粒子
Observing Quasiparticles through the Entanglement Lens
论文作者
论文摘要
通常通过鉴定相关的准粒子或低能激发及其量子数来理解相互作用的量子系统的低能物理。我们提出了一个量子信息框架，该框架超出了这一点，以检查相应的量子状态中纠缠的性质。我们认为，准粒子的显着特征，包括其量子数，位置和分数化，反映在纠缠谱和互信息中。我们在$ d = 1 $横向字段的特定上下文中说明了这些想法，并具有破坏扰动的整合性。
The low energy physics of interacting quantum systems is typically understood through the identification of the relevant quasiparticles or low energy excitations and their quantum numbers. We present a quantum information framework that goes beyond this to examine the nature of the entanglement in the corresponding quantum states. We argue that the salient features of the quasiparticles, including their quantum numbers, locality and fractionalization are reflected in the entanglement spectrum and in the mutual information. We illustrate these ideas in the specific context of the $d=1$ transverse field Ising model with an integrability breaking perturbation.
