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VOLUME 90 (2009) | ISSUE 4 | PAGE 315
Curvature effects on magnetic susceptibility of 1D attractive two component fermions
PACS: 03.75.Ss, 71.10.Pm
Abstract
We develop a bosonization approach for finding magnetic susceptibility of 1D attractive two component Fermi gas at the onset of magnetization taking into account the curvature effects. It is shown that the curvature of free dispersion at the Fermi points couples the spin and charge modes and leads to a linear critical behavior and finite susceptibility for a wide range of models. Possible manifestations of spin-charge coupling in cold atomic gases are also briefly discussed.