QFS2016 Book of Abstracts

Abstracts

P4.10 Magneto-electric and Dielectric Effect Measurement Technique at very Low Temperatures J.S. Xia(1), L. Yin(1), N.S. Sullivan(1), V.S. Zapf(2), and A. Paduan-Filho(3) 1) sNational High Magnetic Field Laboratory, and University of Florida, Gainesville, FL 32611, USA 2) National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA 3) Instituo de Fisica, University de Sao Paulo, Sao Paulo, 05315-970 SP, Brazil We report the design and operation of a device for studying the magneto-electric, dielectric effect, and resistance at very low temperatures (below 10 mK). The unique advantage is the sample is directly immersed in cold liquid 3 He, which is cooled with a large (25 M2) surface area silver sinter heat exchange connected to a nuclear stage magnetization refrigerator. An AC coil is added outside of the sample, so that the capacitance, resistance and DC and AC effects can be measured simultaneously. The details and performance of the device are discussed, and a few of the measurements are demonstrated. P4.11 Microwave source based on SINIS Junction Masuda Shumpei, Tan Kuan Yen, Partanen Matti, Lake Russell, Govenius Joonas, M¨ott¨onen Mikko Aalto University, department of Applied Physics, QCD Labs, PO Box 13500, FI-00076 Aalto, Finland Superconducting circuits provide a promising platform for quantum technological applications. In this context, microwave photons in superconducting resonators and waveguides are routinely used as information and energy carriers between different components of the circuit. We demonstrate an engineered microwave photon source driven by voltage-controlled quantum tunneling of electrons through superconductor-insulator-normal metal junctions. We observe the direct conversion of the electronic energy into microwave photons by measuring the energy spectrum of the created microwave radiation. This device enables electrical control of the photonic state as well as the output power emitted from the resonator, thus functioning as an on-demand photon source that can readily be integrated into quantum circuits.

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