Resonant excitation of the biexciton state in an InAsP quantum dot by a phase-coherent pair of picosecond pulses allows preparing time-bin entangled pairs of photons via the biexciton-exciton cascade. We show that this scheme can be implemented for a dot embedded in an InP nanowire. The underlying physical mechanisms can be represented and quantitatively analyzed by an effective three-level open system master equation. Simulation parameters including decay and intensity dependent dephasing rates are extracted from experimental data, which in turn let us predict the resulting entanglement and optimal operating conditions.
@article{arxiv.2102.00283,
title = {Demonstration and modelling of time-bin entangled photons from a quantum dot in a nanowire},
author = {Philipp Aumann and Maximilian Prilmüller and Florian Kappe and Laurin Ostermann and Dan Dalacu and Philip J. Poole and Helmut Ritsch and Wolfgang Lechner and Gregor Weihs},
journal= {arXiv preprint arXiv:2102.00283},
year = {2022}
}