Nonlinear dynamics of ultracold gases in double-well lattices

TL;DR

This paper investigates the nonlinear dynamics of ultracold gases in double-well lattice potentials, emphasizing the significant impact of collision-induced attenuation on the system's evolution from nonequilibrium states.

Contribution

It introduces a local-field approximation to analyze the nonlinear dynamics of ultracold gases in double-well lattices, highlighting the role of attenuation due to particle collisions.

Findings

Attenuation significantly alters system dynamics.

Nonlinear behavior depends on collision effects.

Initial nonequilibrium states evolve uniquely under attenuation.

Abstract

An ultracold gas is considered, loaded into a lattice, each site of which is formed by a double-well potential. Initial conditions, after the loading, correspond to a nonequilibrium state. The nonlinear dynamics of the system, starting with a nonequilibrium state, is analysed in the local-field approximation. The importance of taking into account attenuation, caused by particle collisions, is emphasized. The presence of this attenuation dramatically influences the system dynamics.