Direct Observation of Josephson Capacitance
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© 2005 American Physical Society (APS). This is the accepted version of the following article: 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, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.95.206806.
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Date
2005
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Mcode
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Language
en
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206806/1-4
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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
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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.