Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Superconductivity & Solids At Low Temperature - Poster Session
TT 7.25: Poster
Montag, 27. März 2006, 14:00–17:45, P1
Theory of ultrafast nonequilibrium dynamics in superconductors — •Julia Unterhinninghofen1, Andreas Knorr1, and Dirk Manske2 — 1Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin — 2Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70596 Stuttgart
A theory of the dynamical ultrafast optical excitation of model superconductors is presented. We consider excitation of a nonequilibrium quasiparticle distribution via a femtosecond optical pulse and the subsequent scattering with optical phonons. The scattering processes lead to a recombination of the excited quasiparticles to equilibrated cooper pairs. Using the density matrix formalism, relaxation processes on a picosecond timescale and time-resolved pump-probe spectra are calculated.