Relative phase and Josephson dynamics between weakly coupled Richardson models (Articolo in rivista)

Type
Label
  • Relative phase and Josephson dynamics between weakly coupled Richardson models (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.87.174506 (literal)
Alternative label
  • Buccheri, Francesco; Trombettoni, Andrea (2013)
    Relative phase and Josephson dynamics between weakly coupled Richardson models
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Buccheri, Francesco; Trombettoni, Andrea (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 16 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 17 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • International School for Advanced Studies; Istituto Nazionale di Fisica Nucleare; Wigner Res Ctr Phys; MTA BME Momentum Stat Field Theory Res Grp; CNR IOM DEMOCRITOS Simulat Ctr (literal)
Titolo
  • Relative phase and Josephson dynamics between weakly coupled Richardson models (literal)
Abstract
  • We consider two weakly coupled Richardson models to study the formation of a relative phase and the Josephson dynamics between two mesoscopic attractively interacting fermionic systems. Our results apply to superconducting properties of coupled ultrasmall metallic grains and to Cooper-pairing superfluidity in neutral systems with a finite number of fermions. We discuss how a definite relative phase between the two systems emerges and how it can be conveniently extracted from the many-body wave function, finding that a definite relative phase difference emerges even for very small numbers of pairs (similar to 10). The Josephson dynamics and the current-phase characteristics are then investigated, showing that the critical current has a maximum at the BCS-BEC crossover. For the considered initial conditions a two-state model gives a good description of the dynamics and of the current-phase characteristics. (literal)
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