title: Topological quantum phase transitions and edge states in spin-orbital coupled Fermi gases.
abstract: We study superconducting states in the presence of spin-orbital coupling and Zeeman field. It is found that a phase transition from a Fulde-Ferrell-Larkin-Ovchinnikov state to the topological superconducting state occurs upon increasing the spin-orbital coupling. The nature of this topological phase transition and its critical property are investigated numerically. Physical properties of the topological superconducting phase are also explored. Moreover, the local density of states is calculated, through which the topological feature may be tested experimentally.
authors.affiliation: 1] College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China [2] Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhou
authors.affiliation: Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, 210023, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
authors.forename: Z D
authors.initials: ZD
authors.lastname: Wang