Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas

TL;DR

This paper predicts the emergence of a stable Weyl superfluid phase in a 3D dipolar Fermi gas induced by anisotropic interactions, with experimental signatures and a feasible transition temperature for cold atom experiments.

Contribution

It introduces a novel stable Weyl superfluid phase in a dipolar Fermi gas using a rotating field to induce anisotropic attraction, expanding topological superfluid research.

Findings

Weyl superfluidity can be stabilized in a 3D dipolar Fermi gas.

Experimental signatures are predicted for cold gases.

Transition temperature is within experimental reach.

Abstract

Weyl superconductivity or superfluidity, a fascinating topological state of matter, features novel phenomena such as emergent Weyl fermionic excitations and anomalies. Here we report that an anisotropic Weyl superfluid state can arise as a low temperature stable phase in a 3D dipolar Fermi gas. A crucial ingredient of our model is a rotating external field that generates a direction-dependent two-body effective attraction. Experimental signatures are predicted for cold gases in radio-frequency spectroscopy. The finite temperature phase diagram of this system is studied and the transition temperature of the Weyl superfluidity is found to be within the experimental scope for atomic dipolar Fermi gases.