Structure and dynamics of a rotating superfluid Bose-Fermi mixture

TL;DR

This paper explores the structure, phases, and vortex dynamics of a rotating superfluid Bose-Fermi mixture, revealing unique hysteresis effects and phase separation behaviors influenced by interactions and rotation.

Contribution

It provides the first detailed phase diagram and analysis of vortex dynamics in a rotating superfluid Bose-Fermi mixture, highlighting novel hysteresis phenomena.

Findings

Identification of ground-state phases influenced by boson-fermion interactions

Observation of mixed and separated phases under rotation

Detection of hysteresis in vortex formation in fermionic superfluids

Abstract

We investigate the structure and dynamics of a rotating superfluid Bose-Fermi mixture (SBFM) made of superfluid bosons and two-component (spin up and down) superfluid fermions. A ground-state phase diagram for the nonrotating case of a SBFM with specific parameters is given, where the ground-state configuration of a nonrotating SBFM is mainly determined by the boson-fermion interaction. For the rotating case of a SBFM with a sufficiently large rotation frequency, we show that the system supports a mixed phase and three typical layer separated phases. In particular, the visible vortex formation in the fermionic superfluid exhibits a remarkable hysteresis effect during the dynamical evolution of a rotating SBFM, which is evidently different from the case of rotating two-component Bose-Einstein condensates.