Ideal Quantum non-demolishing measurement of a flux qubit at variable bias
arXiv:1011.6529 · doi:10.1103/PhysRevB.83.134504
Abstract
We propose a scheme to realize a quantum non-demolition (QND) measurement of a superconducting flux qubit by a Josephson bifurcation amplifier. Our scheme can implement a perfect QND measurement for a qubit subject to a variable magnetic bias. Measurement back-action induced qubit relaxation can be suppressed and hence the QND fidelity is expected to be high over a wide range of bias conditions.
7 pages, 4 figures
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