According to a recent proposal, we describe the quantum dynamics of the Hubbard model at the semiclassical level by implementing the Time-Dependent Variational Principle (TDVP) approach on appropriate macroscopic wave-functions constructed in terms of su(2)-coherent states. Within 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 particular, here we investigate the dynamics of the weakly excited states with non-vanishing pairing, away from half-filling and for repulsive Coulomb interaction.
|Titolo:||Dynamics of the Hubbard model: weakly excited pairing states|
|Data di pubblicazione:||1997|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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