Quasiparticles in the theory of fermion condensation |
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| Authors: | V A Khodel V R Shaginyan P Shuk |
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| Institution: | (1) Kurchatov Institute, Russian Science Center, 123182 Moscow, Russia;(2) St. Petersburg Institute of Nuclear Physics, Russian Academy of Sciences, 188350 Gatchina, Russia;(3) Institut des Sciences Nucleaires, F-38026 Grenoble Cedex, France |
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| Abstract: | It is shown that Landau’s quasiparticle formalism continues to work in systems with a fermion condensate. In the case of a
finite system this formalism is suitable for describing the restructuring of states at the Fermi surface. It also works in
an infinite system, and the idea of quasiparticles at low temperature as well-defined excitations at the Fermi surface remains
valid. The quasiparticle lifetime is directly proportional to the temperature, and the density of states is inversely proportional
to the temperature.
Pis’ma Zh. éksp. Teor. Fiz. 63, No. 9, 719–723 (10 May 1996) |
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