Localization of spin mixing dynamics in a spin-1 Bose-Einstein condensate

TL;DR

This paper introduces a method to localize and control spin mixing dynamics in a spin-1 Bose-Einstein condensate using temporal modulation of spin exchange interactions, enabling suppression of instabilities and exploration of weak magnetic interactions.

Contribution

It presents a novel approach to freeze spin mixing dynamics via optical Feshbach resonance, reducing instabilities in a ferromagnetic condensate, and facilitating the study of weak magnetic interactions.

Findings

Successful localization of spin mixing dynamics.

Suppression of dynamic instability and spin domain formation.

Potential for investigating weak magnetic dipole interactions.

Abstract

We propose to localize spin mixing dynamics in a spin-1 Bose-Einstein condensate by a temporal modulation of spin exchange interaction, which is tunable with optical Feshbach resonance. Adopting techniques from coherent control, we demonstrate the localization/freezing of spin mixing dynamics, and the suppression of the intrinsic dynamic instability and spontaneous spin domain formation in a ferromagnetically interacting condensate of $^{87}$Rb atoms. This work points to a promising scheme for investigating the weak magnetic spin dipole interaction, which is usually masked by the more dominant spin exchange interaction.