Demixing in symmetric supersolid mixtures

TL;DR

This paper investigates how quantum tunneling causes demixing in a symmetric binary mixture of Rydberg-dressed dipolar Bose gases within a supersolid phase, revealing temperature-dependent phase separation.

Contribution

It demonstrates that quantum tunneling induces demixing in a symmetric supersolid mixture, a phenomenon absent in non-superfluid crystals, with implications for cold gas experiments.

Findings

Demixing occurs below the supersolid transition temperature.

Quantum tunneling drives phase separation.

Demixed droplets favor clustering of same component.

Abstract

The droplet crystal phase of a symmetric binary mixture of Rydberg-blockaded dipolar Bose gases is studied by computer simulation. At high temperature each droplet comprises on average equal numbers of particles of either component, but the two components demix below the supersolid transition temperature, i.e., droplets mostly consist of particles of one component. Droplets consisting of the same component will also favor clustering. Demixing is driven by quantum tunnelling of particles across droplets over the system, and does not take place in a non-superfluid crystal. This effect should be easily detectable in a cold gas experiment.