Critical light-matter entanglement at cavity mediated phase transitions

Article

关键词: QUANTUM;    CHEMISTRY;    POLARITONS;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.106.155113

来源: SCIE

【 摘 要 】

We consider a model of a light-matter system, in which a system of fermions (or bosons) is coupled to a photonic mode that drives phase transitions in the matter degrees of freedom. Starting from a simplified analytical model, we show that the entanglement between light and matter vanishes at small and large coupling strength and shows a peak in the proximity of the transition. We perform numerical simulations for a specific model (relevant to both solid state and cold atom platforms) and show that the entanglement displays critical behavior at the transition and features maximum susceptibility, as demonstrated by a maximal entanglement capacity. Remarkably, light-matter entanglement provides direct access to critical exponents, suggesting another approach to measure universal properties without direct matter probes.

【 授权许可】

Free