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Coherent Ultrafast Optical Dynamics of the Fermi Edge Singularity

N. Primozich·T. V. Shahbazyan·I. E. Perakis·D. S. Chemla
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Abstract

We develop a non-equilibrium 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 cxpansion combined with the effective Hamiltonian approach. For short pulse durations, we find a non-exponential 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.

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N. Primozich, T. V. Shahbazyan, I. E. Perakis, D. S. Chemla. 1999-10-04. Coherent Ultrafast Optical Dynamics of the Fermi Edge Singularity. https://doi.org/10.1103/physrevb.61.2041

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