Superfluid to Mott insulator transition in one, two, and three dimensions

TL;DR

This paper investigates the superfluid to Mott insulator transition in quantum gases across one, two, and three dimensions, revealing dimension-dependent differences in excitation spectra through Bragg spectroscopy.

Contribution

It provides the first comparative analysis of the transition in different dimensions using experimental Bragg spectroscopy measurements.

Findings

Excitation spectra vary significantly with dimensionality.

Superfluid to Mott insulator transition observed in all dimensions.

Low-dimensional superfluids show distinct spectral features.

Abstract

We have created one-, two-, and three-dimensional quantum gases and study the superfluid to Mott insulator transition. Measurements of the transition using Bragg spectroscopy show that the excitation spectra of the low-dimensional superfluids differ significantly from the three-dimensional case.