Coherent ultrafast optical dynamics of the Fermi-edge singularity

Academic Article

Abstract

  • We develop a nonequilibrium many-body theory of the coherent femtosecond nonlinear optical response of the Fermi-edge singularity. We study the role of the dynamical Fermi-sea response in the time evolution of the pump-probe spectra. The electron-hole correlations are treated nonperturbatively with the time-dependent coupled cluster expansion combined with the effective Hamiltonian approach. For short pulse durations, we find a nonexponential decay of the differential transmission during negative time delays, which is governed by the interactions. This is in contrast to the results obtained within the Hartree-Fock approximation, which predicts an exponential decay governed by the dephasing time. We discuss the role of the optically induced dephasing effects in the coherent regime. © 2000 The American Physical Society.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Primozich N; Shahbazyan T; Perakis I; Chemla D
  • Start Page

  • 2041
  • End Page

  • 2058
  • Volume

  • 61
  • Issue

  • 3