Detection of a persistent-current qubit by resonant activation
P. Bertet, I. Chiorescu, K. Semba, C. J. P. M Harmans, J. E. Mooij
Abstract
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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