DYNAMICS OF THE HUBBARD-MODEL - WEAKLY EXCITED PAIRING STATES

Authors
MONTORSI A PENNA V
Citation
A. Montorsi et V. Penna, DYNAMICS OF THE HUBBARD-MODEL - WEAKLY EXCITED PAIRING STATES, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 19(8-9), 1997, pp. 1341-1344
Citations number
10
Categorie Soggetti
Physics
Journal title
Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics → ACNP
ISSN journal
03926737
Volume
19
Issue
8-9
Year of publication
1997
Pages
1341 - 1344
Database
ISI
SICI code
0392-6737(1997)19:8-9<1341:DOTH-W>2.0.ZU;2-L
Abstract
According to a recent proposal, we describe the quantum dynamics of th e Hubbard model at the semiclassical level by implementing the Time-De pendent Variational Principle (TDVP) approach on appropriate macroscop ic wave-functions constructed in terms of su(2)-coherent states. Withi n the TDVP procedure, such states turn out to include a time-dependent quantum phase, part of which can be recognized as Berry's phase. In p articular, here we investigate the dynamics of the weakly excited stat es with non-vanishing pairing, away from half-filling and for repulsiv e Coulomb interaction.