Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model (Articolo in rivista)

Type
Label
  • Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Seibold G., Becca F., Lorenzana J. (2008)
    Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Seibold G., Becca F., Lorenzana J. (literal)
Pagina inizio
  • 045114 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 78 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • American Physical Society (APS). (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 17 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Seibold, G.] Brandenburg Tech Univ Cottbus, Inst Phys, D-03013 Cottbus, Germany; [Becca, F.] SISSA, Democritos Natl Simulat Ctr, INFM, CNR, I-34014 Trieste, Italy; [Lorenzana, J.] Univ Roma La Sapienza, Dipartimento Fis, CNR,INFM, Ctr Stat Mech & Complex, I-00185 Rome, Italy; [Lorenzana, J.] CNR, ISC, I-00185 Rome, Italy 1) Institut für Physik, BTU Cottbus, P.O. Box 101344, 03013 Cottbus, Germany 2) CNR-INFM Democritos National Simulation Center, SISSA, I-34014 Trieste, Italy 3) Center for Statistical Mechanics and Complexity, INFM-CNR, Dipartimento di Fisica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 2, 00185 Roma, Italy 4) ISC-CNR, Via dei Taurini 19, 00185 Roma, Italy (literal)
Titolo
  • Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model (literal)
Abstract
  • We present a method to compute pairing fluctuations on top of the Gutzwiller approximation (GA). Our investigations are based on a charge-rotational invariant GA energy functional which is expanded up to second order in the pair fluctuations. Equations of motion for the fluctuations lead to a renormalized ladder-type approximation. Both spectral functions and corrections to static quantities, such as the ground-state energy, are computed. The quality of the method is examined for the single-band Hubbard model, where we compare the dynamical pairing correlations for s- and d-wave symmetries with exact diagonalizations. We find a significant improvement with respect to analogous calculations done within the standard Hartree-Fock ladder approximation. The technique has potential applications in the theory of Auger spectroscopy, superconductivity, and cold atom physics. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it