p-Wave Resonant Bose Gas: A Finite-Momentum Spinor Superfluid

TL;DR

This paper predicts a novel finite-momentum superfluid phase in a p-wave resonant Bose gas, tunable via magnetic field, with distinct superfluid states at different detunings, revealing complex quantum phase behavior.

Contribution

It introduces the concept of a finite-momentum atomic-molecular superfluid in a p-wave resonant Bose gas, highlighting tunability and phase transitions.

Findings

Identification of a finite-momentum AMSF phase.

Demonstration of tunability of the wave vector via magnetic field.

Prediction of quantum phase transitions between superfluid states.

Abstract

We show that a degenerate gas of two-species bosonic atoms interacting through a p-wave Feshbach resonance (as realized in, e.g., a 85Rb-87Rb mixture) exhibits a finite-momentum atomic-molecular superfluid (AMSF), sandwiched by a molecular p-wave (orbital spinor) superfluid and by an s-wave atomic superfluid at large negative and positive detunings, respectively. The magnetic field can be used to tune the modulation wave vector of the AMSF state, as well as to drive quantum phase transitions in this rich system.