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Minimal resonator loss for circuit quantum electrodynamics

Barends, R. and Vercruyssen, N. and Endo, A. and de Visser, P. J. and Zijlstra, T. and Klapwijk, T. M. and Diener, P. and Yates, S. J. C. and Baselmans, J. J. A. (2010) Minimal resonator loss for circuit quantum electrodynamics. Applied Physics Letters, 97 (2). Art. No. 023508. ISSN 0003-6951. doi:10.1063/1.3458705.

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We report quality factors of up to 500 × 10^3 in superconducting resonators at the single photon levels needed for circuit quantum electrodynamics. This result is achieved by using NbTiN and removing the dielectric from regions with high electric fields. As demonstrated by a comparison with Ta, the crucial sources of intensity-dependent loss are dielectrics on the surface of the metal and substrate.

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Additional Information:© 2010 American Institute of Physics. Received 3 May 2010; accepted 9 June 2010; published online 13 July 2010. The authors thank J. M. Martinis and P. Forn-Díaz for stimulating discussions. The work was supported by the Pieter Langerhuizen Lambertuszoon funds of the Royal Holland Society of Sciences and Humanities and by the EU NanoSciERA project “Nanofridge.”
Group:Keck Institute for Space Studies
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Pieter Langerhuizen Lambertuszoon FondsUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20160311-141910535
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65310
Deposited By: Colette Connor
Deposited On:11 Mar 2016 22:30
Last Modified:10 Nov 2021 23:43

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