Title: Attractive Hofstadter-Hubbard model with imbalanced chemical and vector potentials

Speaker: Menderes Işkın (Koç University)

Date/Time: May 13, 2015 Wednesday at 13:40

Place: Sabancı University, FENS L062

Abstract:

I will talk about the interplay between the Hofstadter butterfly, strong interactions and Zeeman field within the mean-field Bogoliubov-de Gennes theory in real space, and explore the ground states of the attractive single-band Hofstadter-Hubbard Hamiltonian on a square lattice, including the exotic possibility of imbalanced vector potentials.

I will show that that the cooperation between the vector potential and superfluid order breaks the spatial symmetry of the system, and flourish stripe-ordered Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like superfluid and supersolid phases that can be distinguished and characterized according to their coexisting pair-density (PDW), charge-density (CDW) and spin-density (SDW) wave orders. I will also discuss confined systems and comment on the likelihood of observing such stripe-ordered phases by loading neutral atomic Fermi gases on laser-induced optical lattices under laser-generated artificial gauge fields.

Contact: İsmet İnönü Kaya iikaya@sabanciuniv.edu