Berezinskii-Kosterlitz-Thouless transition in Josephson junction arrays (Contributo in atti di convegno)

Type
Label
  • Berezinskii-Kosterlitz-Thouless transition in Josephson junction arrays (Contributo in atti di convegno) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1007/978-1-4020-2812-0_12 (literal)
Alternative label
  • L.Capriotti, A.Cuccoli, A.Fubini, V.Tognetti, R.Vaia (2004)
    Berezinskii-Kosterlitz-Thouless transition in Josephson junction arrays
    in NATO Advanced Research Workshop on Fundamental Problems of Mesoscopic Physics Interactions and Decoherence, Granada, Spain, 6-12/09/2003
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L.Capriotti, A.Cuccoli, A.Fubini, V.Tognetti, R.Vaia (literal)
Pagina inizio
  • 203 (literal)
Pagina fine
  • 216 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.springer.com/chapter/10.1007/978-1-4020-2812-0_12 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Fundamental Problems of Mesoscopic Physics: Interactions and Decoherence (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 154 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • in: NATO Advanced Research Workshop: \"Fundamental Problems of Mesoscopic Physics Interactions and Decoherence\", Granada, Spain, edited by I.V.Lerner, B.L.Altshuler, Y.Gefen, 203-218 (2004). Springer, Berlin (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 14 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • - Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA - Dipartimento di Fisica, Università di Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, Italy - Unità I.N.F.M. di Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, Italy - Sezione I.N.F.N. di Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, Italy - Istituto di Fisica Applicata `Nello Carrara' del C.N.R. Via Madonna del Piano, 50019 Sesto Fiorentino, Italy (literal)
Titolo
  • Berezinskii-Kosterlitz-Thouless transition in Josephson junction arrays (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-1-4020-2192-3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • I.V.Lerner, B.Altshuler, Y.Gefen (literal)
Abstract
  • The quantum XY model shows a Berezinskii-Kosterlitz-Thouless (BKT) transition between a phase with quasi long-range order and a disordered one, like the corresponding classical model. The effect of the quantum fluctuations is to weaken the transition and eventually to destroy it. However, in this respect the mechanism of disappearance of the transition is not yet clear. In this work we address the problem of the quenching of the BKT in the quantum XY model in the region of small temperature and high quantum coupling. In particular, we study the phase diagram of a 2D Josephson junction array, that is one of the best experimental realizations of a quantum XY model. A genuine BKT transition is found up to a threshold value g* of the quantum coupling, beyond which no phase coherence is established. Slightly below g* the phase stiffness shows a reentrant behavior at lowest temperatures, driven by strong nonlinear quantum fluctuations. Such a reentrance is removed if the dissipation effect of shunt resistors is included. (literal)
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