THE Q-DEFORMED THOULESS MODEL FOR SUPERCONDUCTIVITY AND THE STUDY OF THERMAL EFFECTS USING NUMBER NONCONSERVING COHERENT STATES

Authors
BONATSOS D AVANCINI SS MENEZES DP PROVIDENCIA C
Citation
D. Bonatsos et al., THE Q-DEFORMED THOULESS MODEL FOR SUPERCONDUCTIVITY AND THE STUDY OF THERMAL EFFECTS USING NUMBER NONCONSERVING COHERENT STATES, Physics letters. A, 192(2-4), 1994, pp. 192-200
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
192
Issue
2-4
Year of publication
1994
Pages
192 - 200
Database
ISI
SICI code
0375-9601(1994)192:2-4<192:TQTMFS>2.0.ZU;2-8
Abstract
Two different quantum deformations of the Thouless model for supercond uctivity are introduced. The ground state energy is estimated by using a coherent state variational method. The coherent states do not conse rve the number of particles, since pairs can be broken by temperature. Thus the number non-conserving coherent states are used in mimicking temperature effects. The point where the second order phase transition takes place is calculated analytically.