Cavity Light-Matter Entanglement through Quantum Fluctuations
Abstract
The hybridization between light and matter forms the basis to achieve cavity control over quantum materials. In this work we investigate a cavity coupled to an XXZ quantum chain of interacting spinless fermions by numerically exact solutions and perturbative analytical expansions. We find two important effects: (i) Specific quantum fluctuations of the matter system play a pivotal role in achieving entanglement between light and matter; and (ii) in turn, light-matter entanglement is the key ingredient to modify electronic properties by the cavity. We hypothesize that quantum fluctuations of those matter operators to which the cavity modes couple are a general prerequisite for light-matter entanglement in the groundstate. Implications of our findings for light-matter-entangled phases, cavity-modified phase transitions in correlated systems, and measurement of light-matter entanglement through Kubo response functions are discussed.
Cite
@article{arxiv.2212.03011,
title = {Cavity Light-Matter Entanglement through Quantum Fluctuations},
author = {Giacomo Passetti and Christian J. Eckhardt and Michael A. Sentef and Dante M. Kennes},
journal= {arXiv preprint arXiv:2212.03011},
year = {2023}
}