Supersolid Gap Soliton in a Bose-Einstein Condensate and Optical Ring Cavity coupling system

TL;DR

This paper demonstrates the existence and properties of supersolid gap solitons in a driven-dissipative Bose-Einstein condensate coupled to a ring cavity, revealing new features due to atom-cavity feedback.

Contribution

It introduces the concept of supersolid gap solitons in a BEC-cavity system and explores their stability and dynamics through numerical solutions.

Findings

Multiple families of supersolid gap solitons identified.

Supersolid gap solitons exhibit unique dynamical features.

Feedback interactions lead to novel soliton properties.

Abstract

The system of a transversely pumped Bose-Einstein condensate (BEC) coupled to a lossy ring cavity can favor a supersolid steady state. Here we find the existence of supersolid gap soliton in such a driven-dissipative system. By numerically solving the mean-field atom-cavity field coupling equations, gap solitons of a few different families have been identified. Their dynamical properties, including stability, propagation and soliton collision, are also studied. Due to the feedback atom-intracavity field interaction, these supersolid gap solitons show numerous new features compared with the usual BEC gap solitons in static optical lattices.