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- W50974689 abstract "For time intervals which are shorter than characteristic periods of the medium, collisions can no longer be regarded as instantaneous. They have to be described instead by non-Markovian scattering integrals. In this early time regime the quantum mechanical coherence of the photo-excited carriers is not yet destroyed. In this regime quantum kinetics with its memory effects yields an excellent description of femtosecond four wave mixing (FWM) and differential transmission spectroscopy (DTS) experiments. The essential features of carrier-phonon scattering and the carrier-carrier scattering via a time-dependently screened Coulomb potential are discussed. Particularly the time-dependent build-up of screening by the optically excited carriers is itself a highly interesting quantum kinetic problem. The determination of the density-dependent dephasing time and the observation of the quantum kinetically predicted phonon-plasmon beats with coherent control techniques are discussed.KeywordsProbe PulseQuantum CoherenceExcitation DensityDensity Matrix ElementQuantum BeatThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
- W50974689 created "2016-06-24" @default.
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- W50974689 date "2004-01-01" @default.
- W50974689 modified "2023-09-27" @default.
- W50974689 title "Quantum Kinetics and Femtosecond Spectroscopy — The Discovery of Slowness" @default.
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- W50974689 doi "https://doi.org/10.1007/978-3-662-09115-9_7" @default.
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