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Journal Article

Cavity Light-Matter Entanglement through Quantum Fluctuations

MPS-Authors
/persons/resource/persons258618

Eckhardt,  C.
Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology;
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

/persons/resource/persons182604

Sentef,  M. A.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);
H H Wills Physics Laboratory, University of Bristol;

/persons/resource/persons245033

Kennes,  D. M.
Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA-Fundamentals of Future Information Technology;
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL);

External Resource

https://arxiv.org/abs/2212.03011
(Preprint)

https://doi.org/10.1103/PhysRevLett.131.023601
(Publisher version)

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Fulltext (public)

2212.03011.pdf
(Preprint), 2MB

Supplementary Material (public)

supplemental_material.pdf
(Supplementary material), 752KB

Citation

Passetti, G., Eckhardt, C., Sentef, M. A., & Kennes, D. M. (2023). Cavity Light-Matter Entanglement through Quantum Fluctuations. Physical Review Letters, 131(2): 023601. doi:10.1103/PhysRevLett.131.023601.


Cite as: https://hdl.handle.net/21.11116/0000-000B-C6A6-A
Abstract
The hybridization between light and matter forms the basis to achieve cavity control over quantum materials. In this Letter we investigate a cavity coupled to a quantum chain of interacting spinless fermions by numerically exact solutions and perturbative analytical expansions. We draw two important conclusions about such systems: (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 a 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 ground state. 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.