Non-abelian Berry's phase and Chern numbers in higher spin pairing condensates
arXiv:cond-mat/0310089 · doi:10.1103/PhysRevB.69.214512
Abstract
We show that the non-Abelian Berry phase emerges naturally in the s-wave and spin quintet pairing channel of spin-3/2 fermions. The topological structure of this pairing condensate is characterized by the second Chern number. This topological structure can be realized in ultra-cold atomic systems and in solid state systems with at least two Kramers doublets.