The dynamics of component separation in a binary mixture of Bose-Einstein condensates

TL;DR

This paper investigates the time-evolution and dynamics of two overlapping Bose-Einstein condensates in different spin states, revealing how their relative motions damp out to form a steady state with a controlled overlap.

Contribution

It provides new insights into the dynamical behavior and steady-state formation of binary BEC mixtures with well-defined initial phases.

Findings

Relative motions damp out quickly

Steady state with adjustable overlap region

Complex initial dynamics leading to stable configuration

Abstract

We present studies of the time-evolution of a two-component system of Bose-Einstein condensates (BEC) in the |F=1, mf=-1> and |2,1> spin states of Rb-87. The two condensates are created with a well-defined relative phase and complete spatial overlap. In subsequent evolution they undergo complex relative motions which tend to preserve the total density profile. the motions quickly damp out, leaving the condensates in a steady state with a nonnegligible (and adjustable) overlap region.