Controlling ultracold atoms in multi-band optical lattices for simulation of Kondo physicsL.-M. Duan
FOCUS center and MCTP, Department of Physics University of Michigan - Ann Arbor, MI 48109, USA
(Received 20 April 2004; accepted in final form 16 June 2004)
We show that ultracold atoms can be controlled in multi-band optical lattices through spatially periodic Raman pulses for investigation of a class of strongly correlated physics related to the Kondo problem. The underlying dynamics of this system is described by a spin-dependent fermionic or bosonic Kondo-Hubbard lattice model even if we have only spin-independent atomic collision interaction. We solve the bosonic Kondo-Hubbard lattice model through a mean-field approximation, and the result shows a clear phase transition from the ferromagnetic superfluid to the Kondo-singlet insulator at the integer filling.
03.75.Mn - Multicomponent condensates; spinor condensates.
03.75.Lm - Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices and topological excitations.
03.75.Ss - Degenerate Fermi gases.
© EDP Sciences 2004