Normal-superfluid interaction dynamics in a spinor Bose gas

TL;DR

This paper investigates the interaction between normal and superfluid components in a spinor Bose gas, revealing how normal-superfluid exchange scattering influences spin dynamics and accelerates spin-domain formation.

Contribution

It demonstrates the role of normal-superfluid exchange scattering in spin locking and domain formation in spinor Bose gases, providing experimental evidence of complex interdependent spin dynamics.

Findings

Normal-superfluid exchange scattering causes spin locking.

Spin-domain formation is accelerated by normal component dynamics.

Experimental data shows complex interdependent spin behavior.

Abstract

Coherent behavior of spinor Bose-Einstein condensates is studied in the presence of a significant uncondensed (normal) component. Normal-superfluid exchange scattering leads to a near-perfect local alignment between the spin fields of the two components. Through this spin locking, spin-domain formation in the condensate is vastly accelerated as the spin populations in the condensate are entrained by large-amplitude spin waves in the normal component. We present data evincing the normal-superfluid spin dynamics in this regime of complicated interdependent behavior.