Dynamics of kicked spin-orbit-coupled Bose-Einstein condensates

TL;DR

This paper explores the complex dynamical behaviors of kicked spin-orbit-coupled Bose-Einstein condensates in a toroidal trap, revealing how varying system parameters induce transitions between different motion regimes and density configurations.

Contribution

It provides a detailed analysis of how spin-orbit coupling and kicking parameters influence the dynamics and density profiles of BECs, highlighting new transition phenomena.

Findings

Density profiles evolve from symmetric to antisymmetric with increasing SOC.

Energy transitions from quasiperiodic motion to quantum beating or localization.

System behavior varies significantly with kick strength and period.

Abstract

We investigate the dynamics of kicked pseudo-spin-1/2 Bose-Einstein condensates (BECs) with spin-orbit coupling (SOC) in a tightly confined toroidal trap. The system exhibits different dynamical behaviors depending on the competition among SOC, kick strength, kick period and interatomic interaction. For weak kick strength, with the increase of SOC the density profiles of two components evolve from overlapped symmetric distributions into staggered antisymmetric distributions, and the evolution of energy experiences a transition from quasiperiodic motion to modulated quantum beating. For large kick strength, when the SOC strength increases, the overlapped symmetric density distributions become staggered irregular patterns, and the energy evolution undergoes a transition from quasiperiodic motion to dynamical localization. Furthermore, in the case of weak SOC, the increase of kick period leads to a transition of the system from quantum beating to Rabi oscillation, while for the case of strong SOC the system demonstrates complex quasiperiodic motion.