Interaction-induced adiabatic cooling and antiferromagnetism of cold fermions in optical lattices

Abstract

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 localisation, an analogue of the Pomeranchuk effect in liquid Helium 3. We discuss its application to the experimental realisation of the antiferromagnetic phase. We illustrate our arguments with Dynamical Mean-Field Theory calculations.

4 pages, 4 figures

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