ISSN:
1434-601X
Keywords:
74.20.Fg
;
74.90 + n
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We examine a Lipkin based two-level pairing model at finite temperature and in the thermodynamic limit. Whereas at T=0 the model exhibits a superconducting ground state for sufficiently high values of the coupling constant, a partially superconducting phase in whichsome of the particles are paired, is found to survive at high temperatures in a special treatment. This phase is a mixture of “abnormally-occupied” eigenstates, which lie at higher energy, of the interactionless model Hamiltonian.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01284478
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