Creating p-wave superfluids and topological excitations in optical lattices

Pietro Massignan

FICO (Institute of Photonic Sciences), Barcelona, Spain

Thursday, November 26, 2009, 10:15 AM
Matfys library


We propose to realize a p-wave superfluid using a Bose-Fermi mixture in a two dimensional optical lattice. We find that in presence of a vortex the system admits a zero-energy (Majorana) mode, which could be usefully exploited to realize a Topologically-protected Quantum Computer. The zero-mode is shown to survive even in the experimentally relevant conditions of finite lattices and external trapping. Close to half-filling, this Majorana mode acquires a novel checkerboard structure characterized by d-wave symmetry.