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Superconducting Qubits

In-operando microwave scattering-parameter calibrated measurement of a Josephson travelling wave parametric amplifier

arXiv
Authors: S. H. Shin, M. Stanley, W. N. Wong, T. Sweetnam, A. Elarabi, T. Lindström, N. M. Ridler, S. E. de Graaf

Year

2024

Paper ID

66898

Status

Preprint

Abstract Read

~2 min

Abstract Words

91

Citations

N/A

Abstract

Superconducting travelling wave parametric amplifiers (TWPAs) are broadband near-quantum limited microwave amplifiers commonly used for qubit readout and a wide range of other applications in quantum technologies. The performance of these amplifiers depends on achieving impedance matching to minimise reflected signals. Here we apply a microwave calibration technique to extract the S-parameters of a Josephson junction based TWPA in-operando. This enables reflections occurring at the TWPA and its extended network of components to be quantified, and we find that the in-operation performance can be well described by the off-state measured S-parameters.

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  • Superconducting travelling wave parametric amplifiers (TWPAs) are broadband near-quantum limited microwave amplifiers commonly used for qubit readout and a wide range of other...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2406.03063 [2] arXiv https://arxiv.org/abs/2406.03063 [3] Publisher https://arxiv.org/abs/2406.03063

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