Compression as a tool to detect Bose glass in cold atoms experiments

TL;DR

This paper proposes a method to identify the Bose glass phase in ultracold atomic gases by analyzing how the cloud's radius changes with trap confinement, aiding experimental detection of this phase.

Contribution

It introduces a novel measurement technique based on cloud radius variation to detect the Bose glass phase in disordered optical lattice experiments.

Findings

Cloud radius variation correlates with phase transitions.

Method distinguishes Bose glass from Mott insulator.

Provides a practical experimental approach.

Abstract

We suggest that measuring the variation of the radius of an atomic cloud when the harmonic tap confinement is varied make it possible to monitor the disappearance of the insulating Mott phase of an ultracold atomic gas trapped in a disordered optical lattice. This paves the way for an unambiguous identification of a Bose glass phase in the system.