Print Email Facebook Twitter Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations Title Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations Author De Visser, P.J. Baselmans, J.J.A. Yates, S.J.C. Diener, P. Endo, A. Klapwijk, T.M. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2012-04-19 Abstract We have measured the number of quasiparticles and their lifetime in aluminium superconducting microwave resonators. The number of excess quasiparticles below 160?mK decreases from 72 to 17??m?3 with a 6?dB decrease of the microwave power. The quasiparticle lifetime increases accordingly from 1.4 to 3.5?ms. These properties of the superconductor were measured through the spectrum of correlated fluctuations in the quasiparticle system and condensate of the superconductor, which show up in the resonator amplitude and phase, respectively. Because uncorrelated noise sources vanish, fluctuations in the superconductor can be studied with a sensitivity close to the vacuum noise. Subject aluminiummicrowavesquasiparticlessuperconducting resonators To reference this document use: http://resolver.tudelft.nl/uuid:3cccc454-bd1f-4e89-b4fe-982deaa60af7 DOI https://doi.org/10.1063/1.4704151 Publisher American Institute of Physics ISSN 0003-6951 Source http://apl.aip.org/resource/1/applab/v100/i16/p162601_s1 Source Applied Physics Letters, 100 (16), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 The Author(s)American Institute of Physics Files PDF deVisser_2012.pdf 552.69 KB Close viewer /islandora/object/uuid:3cccc454-bd1f-4e89-b4fe-982deaa60af7/datastream/OBJ/view