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TT: Fachverband Tiefe Temperaturen

TT 83: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems I

TT 83.11: Vortrag

Donnerstag, 3. April 2014, 12:30–12:45, HSZ 03

Exact solution of polaron dynamics within nonequilibrium dynamical mean-field theory — •Sharareh Sayyad and Martin Eckstein — Max Planck Research Department for structural dynamics, University of Hamburg-CFEL, Hamburg, Germany

Ultra-fast pump-probe experiments have opened promising new avenues to control complex phases in correlated materials on femtosecond timescales. Of particular interest is an understanding of the combined electron lattice dynamics. In this talk we address the fundamental problem of a single electron interacting with the lattice, which is studied within the Holstein model. In equilibrium, this problem has been solved exactly using dynamical mean-field theory (DMFT) [1]. We have generalized this solution to non-equilibrium DMFT, which allows us to investigate the dynamics of photo-excited carriers in the presence of a strong electron-phonon interaction, and thus follow the formation of a polaron in real time.
S. Ciuchi et al., Phy. Rev. B 56, 8 (1997)