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Author Khamzin, A. A. ♦ Nikitin, A. S. ♦ Sitdikov, A. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ APPROXIMATIONS ♦ BCS THEORY ♦ CORRELATION FUNCTIONS ♦ CORRELATIONS ♦ ENERGY GAP ♦ FLUCTUATIONS ♦ HAMILTONIANS ♦ PHASE TRANSFORMATIONS ♦ QUASIPARTICLE-PHONON MODEL ♦ SUPERFLUIDITY
Abstract Superfluidity properties of heated finite Fermi systems are studied in the static fluctuation approximation, which is an original method. This method relies on a single and controlled approximation, which permits taking correctly into account quasiparticle correlations and thereby going beyond the independent-quasiparticle model. A closed self-consistent set of equations for calculating correlation functions at finite temperature is obtained for a finite Fermi system described by the Bardeen–Cooper–Schrieffer Hamiltonian. An equation for the energy gap is found with allowance for fluctuation effects. It is shown that the phase transition to the supefluid state is smeared upon the inclusion of fluctuations.
ISSN 10637788
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-15
Publisher Place United States
Journal Physics of Atomic Nuclei
Volume Number 78
Issue Number 7


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