Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas

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.

6 pages, 5 figures, presentation improved, version as accepted by Phys. Rev. Lett

References in corpus (11)

• Theory of ultracold Fermi gases
• A High Phase-Space-Density Gas of Polar Molecules
• Quantum degenerate dipolar Fermi gas
• Resonantly-paired fermionic superfluids
• Stable Topological Superfluid Phase of Ultracold Polar Fermionic Molecules
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Quantum phases of a Two-Dimensional Dipolar Fermi Gas
• Observation of Fermi surface deformation in a dipolar quantum gas
• Majorana fermions in one-dimensional spin-orbit coupled Fermi gases
• Single Impurity In Ultracold Fermi Superfluids
• Fermion Pairing across a Dipolar Interaction Induced Resonance

Cited by in corpus (4)

• Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas
• Exotic topological density waves in cold atomic Rydberg fermions
• Topological Fulde-Ferrell Superfluids of a Spin-Orbit Coupled Fermi Gas
• Appearance of the universal value $e^2/h$ of the zero-bias conductance in a Weyl semimetal-superconductor junction