The interplay of spin-orbit coupling and Zeeman splitting in ultracold Fermi gases gives rise to a topological superfluid phase in two spatial dimensions that can host exotic Majorana excitations. Theoretical models have so far been based on a four-band Bogoliubov-de Gennes formalism for the combined spin-1/2 and particle-hole degrees of freedom. Here we present a simpler, yet accurate, two-band description based on a well-controlled projection technique that provides a new platform for exploring analogies with chiral p-wave superfluidity and detailed future studies of spatially non-uniform situations.
Cited by 4
Hu et al., Majorana Doublets, Flat Bands, and Dirac Nodes in
Phys. Rev. Lett. 121, 185302 (2018) [Crossref]
Thompson et al., Chiral two-dimensional
-wave superfluid from
-wave pairing in the Bose-Einstein-condensate regime
Phys. Rev. A 101, 013613 (2020) [Crossref]
Toikka, Non-Abelian Majorana fermions in topological s-wave Fermi superfluids
New J. Phys. 21, 113033 (2019) [Crossref]
Thompson et al., Coexistence of topological and nontopological Fermi-superfluid phases
Phys. Rev. Research 3, 043201 (2021) [Crossref]
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- 1 Massey University
- 2 The Dodd-Walls Centre for Photonic and Quantum Technologies [DWC]
- 3 Institute for Basic Science [IBS]
- 4 Te Whare Wānanga o Te Ūpoko o Te Ika a Māui / Victoria University of Wellington
- Marsden Fund (through Organization: Royal Society Te Apārangi / Royal Society of New Zealand)