Dresden 2017 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 73: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 2

TT 73.2: Talk

Thursday, March 23, 2017, 15:15–15:30, HSZ 304

Spatiotemporal buildup of density-density correlations in the 2d Hubbard model — •Manuel Kreye and Stefan Kehrein — Institut für Theoretische Physik, Georg-August-Universität Göttingen, Germany

Driven by recent experimental advances in ultracold atomic gases, the dynamical behavior of quantum many-body systems far from equilibrium has gained a lot of interest. The theoretical comprehension of the observations and the prediction of new phenomena require powerful and reliable methods for studying the real-time dynamics of these many-body systems.

In this work, we apply the method of unitary perturbation theory to study the spatiotemporal buildup of density-density correlations in the two-dimensional Hubbard model after a weak interaction quench. We present analytical results for both susceptibilities and correlation functions on all time scales.