Cavity Light-Matter Entanglement through Quantum Fluctuations

• URL: http://arxiv.org/abs/2212.03011v2
• Date: Thu, 8 Dec 2022 14:40:47 GMT
• Title: Cavity Light-Matter Entanglement through Quantum Fluctuations
• Authors: Giacomo Passetti, Christian J. Eckhardt, Michael A. Sentef, Dante M. Kennes
• Abstract summary: Specific quantum fluctuations of the matter system play a pivotal role in achieving entanglement between light and matter. Light-matter entanglement is the key ingredient to modify electronic properties by the cavity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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