In-operando microwave scattering-parameter calibrated measurement of a Josephson traveling wave parametric amplifier
Year: 2024
Type: article
Abstract: Superconducting traveling 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 minimize 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.
Source: Applied Physics Letters
DOI: 10.1063/5.0220776
Authors: S.-H. Shin, M. Stanley, W. N. Wong, T. Sweetnam, A. Elarabi, T. Lindström, N. M. Ridler, S. E. de Graaf
Institutions: National Physical Laboratory, Sejong University
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4402173233