Abstract
The phenomenon of the so called Fermion condensation, a phase transition analogous to Bose condensation but for Fermions, postulated in the past to occur in systems with strong momentum dependent forces, is reanalyzed in a model with infinite range interactions. The strongly non Fermi Liquid behavior of this system is demonstrated analytically at T = 0 and at T ≠ 0 in the superconducting and normal phases. The validity of the quasiparticle picture is investigated and seen to hold true for temperatures less than the characteristic temperature T f of the Fermion condensation.
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Dukelsky, J., Khodel, V., Schuck, P. et al. Fermion condensation and non Fermi liquid behavior in a model with long range forces. Z. Phys. B 102, 245–254 (1997). https://doi.org/10.1007/s002570050286
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DOI: https://doi.org/10.1007/s002570050286