Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 79: Superconductivity: Superconducting Electronics - Circuit QED
TT 79.8: Vortrag
Donnerstag, 15. März 2018, 11:30–11:45, H 2053
Enhancing photon squeezing one Leviton at a time — •Flavio Ronetti1,2, Dario Ferraro3, Jérôme Rech2, Thibaut Jonckheere2, Thierry Martin2, and Maura Sassetti1 — 1Università di Genova and CNR-SPIN, Via Dodecaneso 33, 16146, Genova, Italy — 2Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France — 3Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genova, Italy
A mesoscopic device in the simple tunnel junction or quantum point contact geometry emits microwaves with remarkable quantum properties, when subjected to a sinusoidal drive in the GHz range. In particular, single and two-photons squeezing as well as entanglement in the frequency domain have been recently reported [1]. By revising the photo-assisted noise analysis developed in the framework of electron quantum optics [2], we present a detailed comparison between the cosine drive case and other experimentally relevent periodic voltages like rectangular and Lorentzian pulses [3]. We show that the latter drive is the best candidate in order to enhance quantumness and purity of the outgoing single and two-photons states in view of quantum information perspectives.
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D. Ferraro, et al., in preparation (2017)