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Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations

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... Full description

Journal Title: Applied Physics Letters 100 (16), 2012, 2012, Issue 16, pp.urn:issn:0003-6951
Main Author: De Visser, P.J.
Other Authors: Baselmans, J.J.A. , Yates, S.J.C. , Diener, P. , Endo, A. , Klapwijk, T.M.
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: NARCIS (National Academic Research and Collaborations Information System)
ID: ISSN: ; ISSN: 0003-6951
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title: Microwave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
format: Article
creator:
  • De Visser, P.J.
  • Baselmans, J.J.A.
  • Yates, S.J.C.
  • Diener, P.
  • Endo, A.
  • Klapwijk, T.M.
subjects:
  • Aluminium
  • Microwaves
  • Quasiparticles
  • Superconducting Resonators
ispartof: Applied Physics Letters, 100 (16), 2012, 2012, Issue 16, pp.urn:issn:0003-6951
description: 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.
language: eng
source: NARCIS (National Academic Research and Collaborations Information System)
identifier: ISSN: ; ISSN: 0003-6951
fulltext: fulltext_linktorsrc
issn:
  • 0003-6951
url: Link


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titleMicrowave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
creatorDe Visser, P.J. ; Baselmans, J.J.A. ; Yates, S.J.C. ; Diener, P. ; Endo, A. ; Klapwijk, T.M.
ispartofApplied Physics Letters, 100 (16), 2012, 2012, Issue 16, pp.urn:issn:0003-6951
identifierISSN: ; ISSN: 0003-6951
subjectAluminium ; Microwaves ; Quasiparticles ; Superconducting Resonators
descriptionWe 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.
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titleMicrowave-induced excess quasiparticles in superconducting resonators measured through correlated conductivity fluctuations
descriptionWe 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.
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