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Statut Confirmé
Série LPA
Domaines cond-mat
Date Lundi 6 Mai 2019
Heure 13:30
Institut LPENS
Salle Conf IV
Nom de l'orateur Senellart-Mardon
Prenom de l'orateur Pascale
Addresse email de l'orateur
Institution de l'orateur C2N, Palaiseau, France
Titre Generation of quantum light in a photon-number superposition
Résumé The ability to generate light in pure quantum states is central to the development of quantum- enhanced technologies. Recently, artificial atoms in the form of semiconductor quantum dots have emerged as an excellent platform for quantum light generation [1-2]. Although controlling the photon number is the backbone of many applications, the generation of pure quantum superpositions in the photon-number basis has remained elusive. Here, we report on the generation of light pulses in a pure quantum superposition of zero, one-, and even two- photons, using a single quantum dot in a microcavity [3]. Through coherent control of the artificial atom transition, a pure quantum superposition of vacuum and one- photon is generated with a full control of their relative populations. Driving the system even stronger, with 2p- pulses, a coherent superposition of vacuum, one- and two-photons is generated, with the two-photon part exceeding the one-photon part-, a state that shows phase super-resolving interferometry. Our experimental demonstration revisits the well-known Hong-Ou-Mandel experiment. [1] Near optimal single photon sources in the solid state, N. Somaschi et al. Nature Photonics 10, 340-345 (2016) [2] High-performance semiconductor quantum-dot single-photon sources, P. Senellart, G. Solomon, A.G. White, Nature Nanotechnology 12, 1026-1039, (2017) [3] Generation of non-classical light in a photon-number superposition, J. C. Loredo, C. Anton et. al, arXiv:1810.05170
Numéro de preprint arXiv
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