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Superconducting Qubits
Open Quantum Systems Decoherence
Single-shot readout of a superconducting flux qubit with a flux-driven Josephson parametric amplifier
arXiv
Authors: Z. R. Lin, K. Inomata, W. D. Oliver, K. Koshino, Y. Nakamura, J. S. Tsai, T. Yamamoto
Year
2013
Paper ID
32514
Status
Preprint
Abstract Read
~2 min
Abstract Words
77
Citations
N/A
Abstract
We report single-shot readout of a superconducting flux qubit by using a flux-driven Josephson parametric amplifier (JPA). After optimizing the readout power, gain of the JPA and timing of the data acquisition, we observe the Rabi oscillations with a contrast of 74% which is mainly limited by the bandwidth of the JPA and the energy relaxation of the qubit. The observation of quantum jumps between the qubit eigenstates under continuous monitoring indicates the nondestructiveness of the readout scheme.
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- We report single-shot readout of a superconducting flux qubit by using a flux-driven Josephson parametric amplifier (JPA).
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