Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor

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O. Naaman and J. Aumentado
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA

Received 31 January 2006; published 19 May 2006

Wehave measured, in real time, individual quasiparticle tunneling in asingle-Cooper-pair transistor, using rf reflectometry on the supercurrent branch. Wehave extracted the even-to-odd and odd-to-even transition rates directly byanalyzing the distributions of dwell times in the even andodd states of the transistor. We discuss both the measurementand analysis techniques and report on the temperature and gatedependence of the quasiparticle tunneling rates.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.73.172504
DOI:	10.1103/PhysRevB.73.172504
PACS:	85.25.Cp; 72.20.Jv; 73.23.-b; 85.35.Gv 85.25.Cp Josephson devices 72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators) 73.23.-b Electronic transport in mesoscopic systems 85.35.Gv Single electron devices YEAR: 2006
KEYWORDS:	superconducting transistors, single electron transistors, superconductive tunnelling, quasiparticles, Cooper pairs, reflectometry

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