Mott Transition of Fermionic Atoms in a Three-Dimensional Optical Trap

R. W. Helmes, T. A. Costi, and A. Rosch
Phys. Rev. Lett. 100, 056403 – Published 6 February 2008

Abstract

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.

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  • Received 13 September 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.056403

©2008 American Physical Society

Authors & Affiliations

R. W. Helmes1, T. A. Costi2, and A. Rosch1

  • 1Institute for Theoretical Physics, University of Cologne, 50937 Cologne, Germany
  • 2Institute of Solid State Research, Research Centre Jülich, 52425 Jülich, Germany

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Vol. 100, Iss. 5 — 8 February 2008

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