Fulde-Ferrell-Larkin-Ovchinnikov states in Fermi gases with unequal populations

We theoretically investigate the microscopic structure of neutral Fermionic systems with unequal atomic populations. By using fully microscopic Bogoliubov-de Gennes framework, we study on the vortex structure in a single-vortex state with and without the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) modulation of the pairing field. It is found that the novel local density of states structure appears at intersection point of the FFLO nodal plane and the vortex line, which reflects the topological structure of the pairing field.