Inducing spin-dependent tunneling to probe magnetic correlations in optical lattices

K. G. L. Pedersen, B. M. Andersen, O. F. Syljuåsen, G. M. Bruun, and A. S. Sørensen
Phys. Rev. A 85, 053642 – Published 29 May 2012

Abstract

We suggest a simple experimental method for probing antiferromagnetic spin correlations of two-component Fermi gases in optical lattices. The method relies on a spin selective Raman transition to excite atoms of one spin species to their first excited vibrational mode where the tunneling is large. The resulting difference in the tunneling dynamics of the two spin species can then be exploited, to reveal the spin correlations by measuring the number of doubly occupied lattice sites at a later time. We perform quantum Monte Carlo simulations of the spin system and solve the optical lattice dynamics numerically to show how the timed probe can be used to identify antiferromagnetic spin correlations in optical lattices.

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  • Received 5 March 2012

DOI:https://doi.org/10.1103/PhysRevA.85.053642

©2012 American Physical Society

Authors & Affiliations

K. G. L. Pedersen1, B. M. Andersen1, O. F. Syljuåsen2, G. M. Bruun3, and A. S. Sørensen1

  • 1Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
  • 2Department of Physics, University of Oslo, P. O. Box 1048 Blindern, N-0316 Oslo, Norway
  • 3Department of Physics and Astronomy, Aarhus University, Ny Munkegade, DK-8000 Aarhus C, Denmark

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Vol. 85, Iss. 5 — May 2012

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