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DY: Fachverband Dynamik und Statistische Physik

DY 7: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 1 (joint session TT/ DY)

DY 7.6: Vortrag

Montag, 16. März 2015, 11:00–11:15, H 0104

Time-dependent Gutzwiller wave function for the Hubbard model in nonequilibrium — •Marcus Kollar¹ and Christian Gramsch^1,2 — ¹Theoretische Physik III, Universitität Augsburg — ²I. Institut für Theoretische Physik, Universität Hamburg

In previous studies the time-dependent Gutzwiller wave function (GWF) has been applied to the fermionic Hubbard model in nonequilibrium [1], using the Gutzwiller approximation which is known to become exact in the limit of infinite lattice dimension. As an alternative, we employ the variational formalism for the GWF which applies in arbitrary dimensions, recovering the dynamics obtained in Ref. [1]. We present results for the one-dimensional Hubbard model, for which exact evaluations of the GWF are available. In particular we find that the GWF captures the transient momentum distribution on short timescales [2].

[1] M. Schiró and M. Fabrizio, Phys. Rev. Lett. 105, 076401 (2010).

[2] S. A. Hamerla and G. S. Uhrig, Phys. Rev. B 87, 064304 (2013).