Fidelity Approach in Topological Superconductors with Disorders
  We apply the fidelity approach to study the topological superconductivity in a spin-orbit coupled nanowire system. The wire is modeled as a one layer lattice chain with Zeeman energy and spin-orbit coupling, which is in proximity to a multi layer superconductor. In particular, we study the effects of disorders and find that the fidelity susceptibility show multiple peaks. It is revealed that the major peak indicates the topological quantum phase transition, while other peaks signal the pining of the Majorana bound states by disorders. 
Wen-Chuan Tian, Guang-Yao Huang, Zhi Wang, Dao-Xin Yao
cond-mat.supr-con cond-mat.mes-hall