Detection of a persistent-current qubit by resonant activation

Details Detection of a persistent-current qubit by resonant activation Detection of a persistent-current qubit by resonant activation

2004-05-03

arxiv.org/abs/cond-mat/0405024v1

Phys. Rev. B 70, 100501 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, submitted to PRB Rapid Com

Scientific paper

10.1103/PhysRevB.70.100501

We present the implementation of a new scheme to detect the quantum state of
a persistent-current qubit. It relies on the dependency of the measuring
Superconducting Quantum Interference Device (SQUID) plasma frequency on the
qubit state, which we detect by resonant activation. With a measurement pulse
of only 5ns, we observed Rabi oscillations with high visibility (65%).

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