Observation of a two-dimensional Fermi gas of atoms

TL;DR

This paper reports the creation and direct imaging of a two-dimensional degenerate Fermi gas of atoms with tunable interactions, providing a platform for studying 2D Fermi physics and critical phenomena in a highly controlled setting.

Contribution

It demonstrates the realization of a 2D Fermi gas with in situ imaging and tunable interactions, advancing experimental capabilities in low-dimensional quantum gases.

Findings

Successful preparation of a 2D degenerate Fermi gas

Direct measurement of density profile and temperature

Tunable interactions via Fano--Feshbach resonance

Abstract

We have prepared a degenerate gas of fermionic atoms which move in two dimensions while the motion in the third dimension is "frozen" by tight confinement and low temperature. {\it In situ} imaging provides direct measurement of the density profile and temperature. The gas is confined in a defect-free optical potential, and the interactions are widely tunable by means of a Fano--Feshbach resonance. This system can be a starting point for exploration of 2D Fermi physics and critical phenomena in a pure, controllable environment.