Solids consist of 1022–1023 particles per cubic centimetre, interacting through infinite-range
Coulomb interactions. The linear response of a solid to a weak external perturbation is well …

Differential absorption spectra of high-quality InGaAs quantum wells are presented for
various pump detunings and polarization configurations. For low intensity pump pulses …

Several tens of femtoseconds after optical excitation, scattering processes in
semiconductors are not completed, thus, relaxation has not yet become irreversible. This …

Highly energetic electrons in GaAs emitting LO phonons are studied via femtosecond
transmission spectroscopy. It is demonstrated for the first time that energy is not conserved …

The real time evolution and relaxation of expectation values of quantum fields and of
quantum states are computed as initial value problems by implementing the dynamical …

We show that the coherent response of semiconductor band-to-band continuum transitions
at room temperature, excited by 11 fs pulses at elevated carrier densities, deviates …

Six-wave mixing in a ZnSe quantum well is investigated and compared with microscopic
theory. We demonstrate that sixth-order Coulomb correlations have a significant qualitative …

The electronic ground state of a perfect semiconductor is pretty boring. In these materials,
electronic energy levels are well described by the effective mass approximation; the …

We address the problem of how to derive quantum kinetic transport equations for electrically
or optically excited semiconductor systems, where the electron dynamics is dominated by …

We have numerically studied the nonlinear gain coefficients in terms of spectral hole burning
for the optical fields in parallel and orthogonal polarizations in semiconductor lasers by …