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 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.
- Received 31 March 2005
DOI:https://doi.org/10.1103/PhysRevLett.95.056401
©2005 American Physical Society