Molecular transitions in Fermi condensates

TL;DR

This paper explores the transition of fermionic systems to Bose-Einstein condensates of dimers, highlighting an intermediate phase of extended dimers during the interaction variation via Feshbach resonance.

Contribution

It introduces the concept of an intermediate phase of extended dimers between superfluid Fermi gas and Bose condensate of molecules.

Findings

Identification of an intermediate phase of extended dimers

Analysis of the transition mechanism via Feshbach resonance

Proposal of a new phase in fermion-to-boson transition

Abstract

We discuss the transition of fermion systems to a condensate of Bose dimers, when the interaction is varied by use of a Feshbach resonance. We argue that there is an intermediate phase between the superfluid Fermi gas and the Bose condensate of molecules, consisting of extended dimers.