QUASI-PARTICLES IN THE THEORY OF FERMION CONDENSATION

Citation
Va. Khodel et al., QUASI-PARTICLES IN THE THEORY OF FERMION CONDENSATION, JETP letters, 63(9), 1996, pp. 752-757
Citations number
8
Categorie Soggetti
Physics
Journal title
ISSN journal
00213640
Volume
63
Issue
9
Year of publication
1996
Pages
752 - 757
Database
ISI
SICI code
0021-3640(1996)63:9<752:QITTOF>2.0.ZU;2-T
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 thi s formalism is suitable for describing the restructuring of states at the Fermi surface. It also works in an infinite system, and the idea o f quasiparticles at low temperature as well-defined excitations at the Fermi surface remains valid. The quasiparticle lifetime is directly p roportional to the temperature, and the density of states is inversely proportional to the temperature. (C) 1996 American Institute of Physi cs.