Superfluid properties of a Bose-Einstein condensate in an optical lattice confined in a cavity

TL;DR

This paper investigates how a one-dimensional optical lattice within a cavity affects the superfluid behavior of a Bose-Einstein condensate, highlighting the role of cavity backaction and external pumping in controlling superfluid properties.

Contribution

It introduces a novel approach to manipulate BEC superfluidity using cavity-induced band structures and external pump control, expanding the understanding of light-matter interactions in quantum gases.

Findings

Cavity light field develops a band structure due to strong coupling.

Pump and cavity control can tune superfluid properties.

Atomic backaction significantly modifies the optical potential.

Abstract

We study the effect of a one dimensional optical lattice in a cavity field with quantum properties on the superfluid dynamics of a Bose-Einstein condensate(BEC). In the cavity the influence of atomic backaction and the external driving pump become important and strongly modify the optical potential. Due to the strong coupling between the condensate wavefunction and the cavity modes, the cavity light field develops a band structure. This study reveals that the pump and the cavity emerges as a new handle to control the superfluid properties of the BEC.