Sommaire:

It is well established that quantum dots (QD) present an atom-like spectrum and constitute a very good indistinguishable and single photon emitter making them promising candidates for quantum information processes. In this talk I will show how their discrete energy structure allows to probe the interactions between a quantum system and its surrounding solid-state environment (fluctuating charges, phonons). By performing two-photon interference experiments in an Hong-Ou-Mandel setup under strictly resonant excitation and as function of the temperature, the QD-phonon interaction can be probed. We have identified two different processes responsible for the loss of the indistiguishability, one because of real phonon transitions, the other one accounts for virtual phonon transitions due to the presence of higher lying excited states in the QD.

Pour plus d'informations, merci de contacter Jacques V.