Phys. Rev. Lett. 95, 056401 (2005) [4 pages]Interaction-Induced Adiabatic Cooling and Antiferromagnetism of Cold Fermions in Optical LatticesReceived 31 March 2005; published 25 July 2005 We propose an interaction-induced cooling mechanism for two-component cold fermions in an optical lattice. It is based on an increase of the spin entropy upon localization, an analogue of the Pomeranchuk effect in liquid helium 3. We discuss its application to the experimental realization of the antiferromagnetic phase. We illustrate our arguments with dynamical mean-field theory calculations. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.056401
DOI:
10.1103/PhysRevLett.95.056401
PACS:
71.10.Fd, 03.75.Lm, 32.80.Pj, 71.30.+h
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