Berlin 2018 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 79: Superconductivity: Superconducting Electronics - Circuit QED
TT 79.8: Talk
Thursday, March 15, 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.
G. Gasse, et al., Phys. Rev. Lett. 111, 136601 (2013).
J. Dubois, et al., Nature 502, 659 (2013).
D. Ferraro, et al., in preparation (2017)