Efficient population transfer in a quantum dot exciton under phonon-induced decoherence via shortcuts to adiabaticity

This is the authors' abstract. We don't add key points for this paper.

In this study, we apply shortcut to adiabaticity pulses (time-dependent Rabi frequency and detuning) for the efficient population transfer from the ground to the exciton state in a GaAs/InGaAs quantum dot with phonon-induced dephasing. We use the time-evolving matrix product operator method to propagate system in time and find that, for temperatures below 204pt0exK and pulse duration up to 104pt0exps, a very good transfer efficiency is obtained in general. We explain these results using a Bloch-type equation derived from a generalized Lindblad equation, which adequately describes system dynamics at lower temperatures. For higher temperatures, the transfer efficiency is significantly reduced except for subpicosecond pulses, where the shortcut Rabi frequency reduces to a delta pulse attaining a fast population inversion. This work is expected to find application in quantum technologies which exploit quantum dots for single-photon generation on demand.