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

M. D. Shaw ; Justin F. Schneiderman ; J. Bueno ; B. S. Palmer ; Per Delsing (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; P. M. Echternach
Physical Review B (1098-0121). Vol. 79 (2009), 1,
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2009-06-17. Senast ändrad 2009-06-22.
CPL Pubid: 95089