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DESCRIPTION:Jean-Damien Pillet\, Columbia University\n\nMicrowave signals h
ave appeared during the last decade as a powerful and versatile platform t
o investigate a wide variety of quantum phenomena\, from fundamental quant
um optics to more oriented researches toward quantum information processin
g. This specific place originates from the fact that microwave signals can
on one hand be precisely tailored and controlled with standard commercial
electronics. On the other hand they can easily be processed at the single
photon level in the quantum regime by superconducting circuits cooled dow
n to dilution fridge temperatures thanks to a unique component\, the Josep
hson junction\, an intrinsic non dissipative lumped non-linear inductor.\n
\nI will present how we designed and built a superconducting circui t\, based on a Josephson ring modulator (JRM)\, a ring of 4 Josephson junc tions in a Wheatstone bridge configuration\, allowing non-degenerate three wave-mixing. I will show that\, when pumped at the appropriate frequency\ , this single circuit behaves as a tunable beam splitter with frequency co nversion\, a quantum limited amplifier or an EPR states generator. Using f requency conversion\, we demonstrate on demand capture\, storage and relea se of microwave radiations with approx. 80% catching efficiency and about 30 storage operations per memory lifetime. We then demonstrate entanglemen t generation between a propagating microwave mode and a localized mode in the cavity. DTSTART:20140424T193000Z LOCATION:Physics Building\, Room 204 SUMMARY:Amplification\, entanglement and storage of microwave radiation usi ng superconducting circuits END:VEVENT END:VCALENDAR