Stability and chaotic behavior of Bose-Einstein condensates in optical lattices with two- and three-body interactions

TL;DR

This paper analyzes how two- and three-body interactions influence the stability, bifurcations, and chaotic dynamics of Bose-Einstein condensates in optical lattices through analytical and numerical methods.

Contribution

It reveals the impact of three-body interactions on bifurcation points and self-trapping behaviors, and explores the transition from order to chaos under periodic modulation.

Findings

Three-body interactions shift bifurcation points.

Existence of three-body interactions affects quantum self-trapping.

Periodic modulation induces transition from order to chaos.

Abstract

The stability and chaotic behaviors of Bose-Einstein condensates with two- and three-atom interactions in optical lattices are discussed with analytical and numerical methods. It is found that the steady-state relative population appears tuning-fork bifurcation when the system parameters are changed to certain critical values. In particular, the existence of three-body interaction not only transforms the bifurcation point of the system but also affects greatly on the macroscopic quantum self-trapping behaviors of the system associated with the critically stable steady-state solution. In addition, we also investigated the influence of the initial conditions, three-body interaction and the energy bias on the macroscopic quantum self-trapping. Finally, by applying the periodic modulation on the energy bias, we find that the relative population oscillation exhibits a process from order to chaos, via a series of period-doubling bifurcations.