Quantum nondemolition readout using a Josephson bifurcation amplifier
Physical Review B—Condensed Matter and Materials Physics, 2007•APS
We report an experiment on the determination of the quantum nondemolition (QND) nature
of a readout scheme of a quantum electrical circuit. The circuit is a superconducting
quantum bit measured by microwave reflectometry using a Josephson bifurcation amplifier.
We perform a series of two subsequent measurements, record their values and correlation,
and quantify the QND character of this readout.
of a readout scheme of a quantum electrical circuit. The circuit is a superconducting
quantum bit measured by microwave reflectometry using a Josephson bifurcation amplifier.
We perform a series of two subsequent measurements, record their values and correlation,
and quantify the QND character of this readout.
We report an experiment on the determination of the quantum nondemolition (QND) nature of a readout scheme of a quantum electrical circuit. The circuit is a superconducting quantum bit measured by microwave reflectometry using a Josephson bifurcation amplifier. We perform a series of two subsequent measurements, record their values and correlation, and quantify the QND character of this readout.
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