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arXiv · 2208.06898

Cavity induced many-body localization

Rong-Chun Ge·Saeed Rahmanian Koshkaki·Michael H. Kolodrubetz
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Abstract

In this manuscript, we explore the feasibility of achieving many-body localization in the context of cavity quantum electrodynamics at strong coupling. Working with a spinless electronic Hubbard chain sitting coupled to a single-mode cavity, we show that the global coupling between electrons and photons -- which generally would be expected to delocalize the fermionic excitations -- can instead favor the appearance of localization. This is supported by a novel high-frequency expansion that correctly accounts for electron-photon interaction at strong coupling, as well as numerical calculations in both single particle and many-bod regimes. We find evidence that many-body localization may survive strong quantum fluctuations of the photon number by exploring energy dependence, seeing signatures of localization down to photon numbers as small as $n\sim2$.

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Rong-Chun Ge, Saeed Rahmanian Koshkaki, Michael H. Kolodrubetz. 2022-08-14. Cavity induced many-body localization. https://arxiv.org/abs/2208.06898

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