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TT: Fachverband Tiefe Temperaturen

TT 30: CE: Low-dimensional Systems - Models 1

TT 30.12: Vortrag

Donnerstag, 25. März 2010, 12:30–12:45, H20

Dynamical crossover in the fermionic Hubbard model — •Florian Goth and Fakher F. Assaad — Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

We consider an implementation of the Diagrammatic Determinantal Quantum Monte-Carlo method on a Keldysh contour to study the realtime dependent evolution of the one-dimensional Hubbard model. The system is prepared in a thermal initial state, and the reaction to a sudden switching off of the Hubbard interaction is examined. The transition from an insulating thermal state at half-filling to metal like behaviour is studied on the basis of spin, charge and pairing correlation functions.