期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.076401
关键词
-
资金
- Italian Ministry of University and Research
A simple and very flexible variational approach to the out-of-equilibrium quantum dynamics in strongly correlated electron systems is introduced through a time-dependent Gutzwiller wave function. As an application, we study the simple case of a sudden change of the interaction in the fermionic Hubbard model and find at the mean-field level an extremely rich behavior. In particular, a dynamical transition between small and large quantum quench regimes is found to occur at half-filling, in accordance with the analysis of Eckstein et al., Phys. Rev. Lett. 103, 056403 (2009), obtained by dynamical mean-field theory, that turns into a crossover at any finite doping.
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