Mott transition of fermionic atoms in a three-dimensional optical trap.
We study theoretically the Mott metal-insulator transition for a system of fermionic atoms confined in a three-dimensional optical lattice and a harmonic trap. We describe an inhomogeneous system of several thousand sites using an adaptation of dynamical mean-field theory solved efficiently with the numerical renormalization group method. Above a critical value of the on-site interaction, a Mott-insulating phase appears in the system. We investigate signatures of the Mott phase in the density profile and in time-of-flight experiments.
Helmes
R W
RW
Institute for Theoretical Physics, University of Cologne, 50937 Cologne, Germany.
Costi
T A
TA
Rosch
A
A