Progress in the development of a single Cooper-pair box qubit
Journal article, 2009

We describe in this review progress in techniques for measuring the quantum states of the single Cooper-pair box (SCB) at the Jet Propulsion Laboratory, and the use of these techniques to characterize their performance as quantum bits. Initially, the Radio-Frequency-Single-Electron Transistor was used to measure conventional and differential versions of the SCB. To overcome some of the difficulties associated with the radio-frequency single-electron transistor, a transition was made to readout based on the quantum capacitance technique. Using this method, entanglement between two SCBs was demonstrated spectroscopically and with ground state characterization.


P. M. Echternach

Jet Propulsion Laboratory, California Institute of Technology

Justin Schneiderman


M. D. Shaw

University of Southern California

Per Delsing

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Quantum Information Processing

1570-0755 (ISSN)

Vol. 8 2-3 183-198

Subject Categories

Physical Sciences

Condensed Matter Physics



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