Topological superfluids on a lattice with non-Abelian gauge fields

Details Topological superfluids on a lattice with non-Abelian gauge fields Topological superfluids on a lattice with non-Abelian gauge fields

2010-07-27

arxiv.org/abs/1007.4827v2

Europhys.Lett.92:46004,2010

Physics

Condensed Matter

Superconductivity

6 pages, 5 figures to be published in Europhysics Letters

Scientific paper

10.1209/0295-5075/92/46004

Two-component fermionic superfluids on a lattice with an external non-Abelian gauge field give access to a variety of topological phases in presence of a sufficiently large spin imbalance. We address here the important issue of superfluidity breakdown induced by spin imbalance by a self-consistent calculation of the pairing gap, showing which of the predicted phases will be experimentally accessible. We present the full topological phase diagram, and we analyze the connection between Chern numbers and the existence of topologically protected and non-protected edge modes. The Chern numbers are calculated via a very efficient and simple method.

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