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Superradiance Induced Particle Flow via Dynamical Gauge Coupling.

Accepted version
Peer-reviewed

Type

Article

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Authors

Zheng, W 
Cooper, NR 

Abstract

We study fermions that are gauge coupled to a cavity mode via Raman-assisted hopping in a one-dimensional lattice. For an infinite lattice, we find a superradiant phase with an infinitesimal pumping threshold which induces a directed particle flow. We explore the fate of this flow in a finite lattice with boundaries, studying the nonequilibrium dynamics including fluctuation effects. The short-time dynamics is dominated by superradiance, while the long-time behavior is governed by cavity fluctuations. We show that the steady state in the finite lattice is not unique and can be understood in terms of coherent bosonic excitations above a Fermi surface in real space.

Description

Keywords

cond-mat.quant-gas, cond-mat.quant-gas

Journal Title

Phys Rev Lett

Conference Name

Journal ISSN

0031-9007
1079-7114

Volume Title

117

Publisher

American Physical Society (APS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/K030094/1)
This work was supported by EPSRC Grant No. EP/K030094/1.