Berlin 2015 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 19: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 2 (jointly with DY)

TT 19.11: Talk

Monday, March 16, 2015, 17:45–18:00, H 3010

Real-time polaron formation: a nonequilibrium DMFT study — •Sharareh Sayyad and Martin Eckstein — Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Hamburg, Germany

To characterize the real-time polaron formation, we study the interaction-quench in the one-band Holstein model for the low density limit of carriers [1]. In this talk, first, we will briefly discuss the exact nonequilibrium self-energy within the framework of the dynamical mean field theory. Furthermore, we will describe the emergence of a polaron in the strong coupling limit, which is indicated by the splitting the band into the ``dressed'' electronic band as well as a dispersion-less ``polaronic'' one. Finally, we will investigate the properties of the real-time formed-polaron and compare them to their equilibrium counterparts.

[1] Sh. Sayyad, M. Eckstein, arXiv:1410.4298(2014).