Abstract
We generalize the Fermi-liquid theory to component systems with symmetry. We evaluate the Fermi-liquid parameters, effective mass, compressibility, and spin susceptibilities for a repulsive gas. We emphasize the important role of induced density fluctuations when is large. These fluctuations dramatically modify the properties of the gas, in particular the spin susceptibilities, from mean-field predictions.
- Received 19 December 2013
- Revised 11 February 2014
DOI:https://doi.org/10.1103/PhysRevA.89.043610
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