1204.3149 (Zhong Wang et al.)

Correlated topological superconductors and topological phase transitions
via Green's function    [PDF]

Zhong Wang, Shou-Cheng Zhang

We propose several topological order parameters expressed in terms of Green's function at zero frequency for topological superconductors, which generalizes the previous work for interacting insulators. The coefficient in topological field theory is expressed in terms of zero frequency Green's function. We also study topological phase transition beyond non-interacting limit in this zero frequency Green's function approach.

View original: http://arxiv.org/abs/1204.3149