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Characterization of an entangled system of two superconducting qubits using a multiplexed capacitance measurement

Journal article
Authors M. D. Shaw
Justin F. Schneiderman
J. Bueno
B. S. Palmer
Per Delsing
P. M. Echternach
Published in Physical Review B
Volume 79
Issue 1
ISSN 1098-0121
Publication year 2009
Published at
Language en
Subject categories Physical Sciences, Superconductivity, Low temperature physics, Mesoscopic physics


We characterize a pair of Cooper-pair boxes coupled with a fixed capacitor using spectroscopy and measurements of the ground-state quantum capacitance. We use the extracted parameters to estimate the concurrence or degree of entanglement between the two qubits. We also present a thorough demonstration of a multiplexed quantum capacitance measurement technique, which is in principle scalable to a large array of superconducting qubits.

Page Manager: Webmaster|Last update: 9/11/2012

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