Superfluid transition in quasi2D Fermi gases

TL;DR

This paper investigates superfluidity in quasi2D Fermi gases, calculating critical temperatures in different regimes and exploring the stability of Bose-Einstein condensates formed by dimers.

Contribution

It provides theoretical analysis of superfluid transition temperatures and stability conditions in quasi2D Fermi gases across different interaction regimes.

Findings

Critical temperature T_c calculated for BCS pairing regime.

Potential to increase T_c relative to Fermi energy.

Stable Bose-Einstein condensate of dimers in strong coupling limit.

Abstract

We show that atomic Fermi gases in quasi2D geometries are promising for achieving superfluidity. In the regime of BCS pairing for weak attraction, we calculate the critical temperature T_c and analyze possibilities of increasing the ratio of T_c to the Fermi energy. In the opposite limit, where a strong coupling leads to the formation of weakly bound quasi2D dimers, we find that their Bose-Einstein condensate will be stable on a long time scale.