Superfluid transitions in bosonic atom-molecule mixtures near Feshbach resonance

TL;DR

This paper predicts a novel molecular superfluid phase in bosonic atom-molecule mixtures near Feshbach resonance, analyzing its properties and phase transitions at various temperatures.

Contribution

It introduces the concept of a molecular superfluid phase in bosonic mixtures and explores its properties and phase transitions.

Findings

Identification of a molecular superfluid phase

Analysis of phase transitions between normal, atomic, and molecular superfluids

Characterization of zero- and finite-temperature behaviors

Abstract

We study bosonic atoms near a Feshbach resonance, and predict that in addition to a standard normal and atomic superfluid phases, this system generically exhibits a distinct phase of matter: a molecular superfluid, where molecules are superfluid while atoms are not. We explore zero- and finite-temperature properties of the molecular superfluid (a bosonic, strong-coupling analog of a BCS superconductor), and study quantum and classical phase transitions between the normal, molecular superfluid and atomic superfluid states.