Effective p-wave interaction and topological superfluids in s-wave quantum gases

Abstract

P-wave interaction in cold atoms may give rise to exotic topological superfluids. However, the realization of p-wave interaction in cold atom system is experimentally challenging. Here we propose a simple scheme to synthesize effective $p$-wave interaction in conventional $s$-wave interacting quantum gases. The key idea is to load atoms into spin-dependent optical lattice potential. Using two concrete examples involving spin-1/2 fermions, we show how the original system can be mapped into a model describing spinless fermions with nearest neighbor p-wave interaction, whose ground state can be a topological superfluid that supports Majorana fermions under proper conditions. Our proposal has the advantage that it does not require spin-orbit coupling or loading atoms onto higher orbitals, which is the key in earlier proposals to synthesize effective $p$-wave interaction in $s$-wave quantum gases, and may provide a completely new route for realizing $p$-wave topological superfluids.

arXiv comment5 pages, 4 figures

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Cited by in corpus (11)

• A two-leg Su-Schrieffer-Heeger chain with glide reflection symmetry
• Cavity-mediated unconventional pairing in ultracold fermionic atoms
• Synthesizing Majorana zero-energy modes in a periodically gated quantum wire
• Tunable boson-assisted finite-range interaction and engineering Majorana corner modes in optical lattices
• Superfluidity of a dipolar Fermi gas in 2D optical lattices bilayer
• Supersolid phases of dipolar fermions in a two-dimensional-lattice bilayer array
• Tunable topological phases with fermionic atoms in a one-dimensional flux lattice
• Artificial topological models based on a one-dimensional spin-dependent optical lattice
• Fulde-Ferrell superfluids in spinless ultracold Fermi gases
• Odd-parity topological superfluidity for fermions in a bond-centered square optical lattice
• Field-induced topological pair-density wave states in a multilayer optical lattice