Phonon-Induced Dephasing of Optically Driven Exciton States in Quantum Dots: Spectral Interpretation

Abstract

We discuss phonon-induced perturbation of optically driven coherent dynamics of a confined exciton in a quantum dot in terms of nonlinear spectra of the driving pulse. Damping of pulse-area-dependent Rabi oscillations and phonon-assisted pumping of optically inactive states are analyzed.

Theory of two-photon processes in quantum dots: Coherent evolution and phonon-induced dephasing

“…However, much additional insight can be gained from a perturbative approximation to this equation 15,35,36 and from the spectral interpretation it provides. 14,37 Let us note that, as long as the perturbation to the system evolution remains small, the reduced density matrix in the interaction picture differs little from its initial value. Hence, ͑t͒ on the right-hand side of Eq.…”