Direct observation of josephson capacitance

M. A. Sillanpää; T. Lehtinen; A. Paila; Yu Makhlin; L. Roschier; P. J. Hakonen

doi:10.1103/PhysRevLett.95.206806

Direct observation of josephson capacitance

M. A. Sillanpää, T. Lehtinen, A. Paila, Yu Makhlin, L. Roschier, P. J. Hakonen

Research output: Contribution to journal › Article › peer-review

95 Citations (Scopus)

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.

Original language	English
Article number	206806
Journal	Physical Review Letters
Volume	95
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.95.206806
Publication status	Published - 11 Nov 2005
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.95.206806

Cite this

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AU - Paila, A.

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AU - Roschier, L.

AU - Hakonen, P. J.

PY - 2005/11/11

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AB - 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.

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Direct observation of josephson capacitance

Abstract

ASJC Scopus subject areas

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