Cavity induced many-body localization
- URL: http://arxiv.org/abs/2208.06898v2
- Date: Wed, 19 Jul 2023 09:16:20 GMT
- Title: Cavity induced many-body localization
- Authors: Rong-Chun Ge, Saeed Rahmanian Koshkaki, Michael H. Kolodrubetz
- Abstract summary: We show that the global coupling between electrons and photons can favor the appearance of localization.
We find evidence that many-body localization may survive strong quantum fluctuations of the photon number.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- 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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