Physics Seminar
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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