Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 21: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 3 (joint session TT/ DY)

DY 21.5: Vortrag

Dienstag, 17. März 2015, 15:00–15:15, H 3010

Spectral Properties of One-Dimensional Fermi Systems after an Interaction Quench — •Christian Klöckner, Dante Marvin Kennes, and Volker Meden — Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA - Fundamentals of Future Information Technology, 52056 Aachen, Germany

We show that the single-particle spectral properties of gapless one-dimensional Fermi systems in the Luttinger liquid state reached at intermediate times after an abrupt quench of the two-particle interaction are highly indicative of the unusual nonequilibrium nature of this state. Analytical and numerical insights gained by applying bosonization are presented. The resulting line shapes of the momentum-integrated and -resolved spectral functions strongly differing from their ground state as well as finite temperature equilibrium counterparts.