Direct Observation of Josephson Capacitance

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2005
Major/Subject
Mcode
Degree programme
Language
en
Pages
206806/1-4
Series
Physical Review Letters, Volume 95, Issue 20
Abstract
The effective capacitance has been measured in the split Cooper-pair box (CPB) over its phase-gate bias plane. Our low-frequency reactive measurement scheme allows us to probe purely the capacitive susceptibility due to the CPB band structure. The data are quantitatively explained using parameters determined independently by spectroscopic means. In addition, we show in practice that the method offers an efficient way to do nondemolition readout of the CPB quantum state.
Description
Keywords
Cooper-pair box, capacitance, spectroscopy, Josephson junctions
Other note
Citation
Sillanpää, Mika A. & Lehtinen, T. & Paila, A. & Makhlin, Yu. & Roschier, L. & Hakonen, P. J. 2005. Direct Observation of Josephson Capacitance. Physical Review Letters. Volume 95, Issue 20. 206806/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.95.206806.