Spin echo in spinor dipolar Bose-Einstein condensates

TL;DR

This paper proposes and demonstrates a theoretical and numerical method to observe spin echo in spinor Bose-Einstein condensates, revealing magnetic dipole interactions through relaxation time analysis.

Contribution

It introduces a novel approach to detect magnetic dipole interactions in spinor BECs using spin echo techniques and relaxation time separation.

Findings

Spin echo can be realized in spinor BECs.

Two relaxation times characterize the spin density dynamics.

Method reveals magnetic dipole interactions.

Abstract

We theoretically propose and numerically realize spin echo in a spinor Bose--Einstein condensate (BEC). We investigate the influence on the spin echo of phase separation of the condensate. The equation of motion of the spin density exhibits two relaxation times. We use two methods to separate the relaxation times and hence demonstrate a technique to reveal magnetic dipole--dipole interactions in spinor BECs.