What can ultracold Fermi gases teach us about high $T_c$ superconductors and vice versa?

TL;DR

This review explores how ultracold Fermi gases can model high-temperature superconductors, highlighting the pseudogap phenomenon and the smooth BCS-BEC crossover, revealing insights applicable to both fields.

Contribution

It provides a comprehensive comparison of ultracold Fermi gases and high $T_c$ superconductors, emphasizing the pseudogap and BCS-BEC crossover as common features.

Findings

Pseudogap phenomena are similar in ultracold gases and high $T_c$ superconductors.

Smooth evolution from BCS to BEC regimes in cold atoms.

Experimental tools reveal key similarities between the two systems.

Abstract

We review recent developments in the field of ultracold atomic Fermi gases. As the cold atom system evolves from BCS to Bose-Einstein condensation (BEC), the behavior of the thermodynamics, and the particle density profiles evolves smoothly in a way which can be well understood theoretically. In the interesting "unitary" regime, we show that these and other data necessarily requires the introduction of a pseudogap in the fermionic spectrum which exhibits many striking similarities to its counterpart in underdoped high $T_c$ superconductors. We emphasize these similarities, giving an overview of the experimental tools and key issues of common interest in both systems.