Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime

TL;DR

This paper investigates how dipole-dipole interactions influence phase separation in a two-component Bose-Einstein condensate across quasi-one-dimensional and quasi-two-dimensional regimes, revealing contrasting behaviors in atom distribution.

Contribution

It provides a detailed numerical analysis of dipolar effects on phase separation, highlighting regime-dependent phenomena in two-component BECs with magnetic dipoles.

Findings

Atoms in nonmagnetic component are squeezed out at low dipolar strength in 1D.

Magnetic dipolar atoms are expelled at high dipolar strength in 1D.

Distinct phase separation behaviors are observed between quasi-1D and quasi-2D regimes.

Abstract

We consider a two-component Bose-Einstein condensate, which contains atoms with magnetic dipole moments aligned along the $z$ direction (labeled as component 1) and nonmagnetic atoms (labeled as component 2). The problem is studied by means of exact numerical simulations. The effects of dipole-dipole interaction on phase separations are investigated. It is shown that, in the quasi-one-dimensional regime, the atoms in component 2 are squeezed out when the dimensionless dipolar strength parameter is small, whereas the atoms in component 1 are pushed out instead when the parameter is large. This is in contrast to the phenomena in the quasi-two-dimensional regime. These two components are each kicked out by the other in the quasi-one-dimensional regime and this phenomenon is discussed as well.