Lattice solitons in quasicondensates

TL;DR

This paper investigates how bright solitons can form in quasicondensates within optical lattices at finite temperatures, highlighting the creation of phase-coherent structures despite fluctuations and introducing new variational models.

Contribution

It introduces a novel family of variational functions that accurately describe solitons in quasicondensates, accounting for non-linear band effects and finite temperature phase fluctuations.

Findings

Solitonic structures can form with well-defined phases despite strong fluctuations.

The proposed variational functions effectively model soliton properties.

Analysis of soliton mobility and collision dynamics in the lattice.

Abstract

We analyze finite temperature effects in the generation of bright solitons in condensates in optical lattices. We show that even in the presence of strong phase fluctuations solitonic structures with well defined phase profile can be created. We propose a novel family of variational functions which describe well the properties of these solitons and account for the non-linear effects in the band structure. We discuss also the mobility and collisions of these localized wave packets.