TY - GEN
T1 - Nonlinear Elements in Traveling-Wave Parametric Amplifiers for Dispersive Qubit Readout
AU - Haider, Michael
AU - Yuan, Yongjie
AU - Jirauschek, Christian
N1 - Publisher Copyright:
© 2023 European Association for Antennas and Propagation.
PY - 2023
Y1 - 2023
N2 - In this paper, we present models for the nonlinearity of different nonlinear elements for superconducting Josephson traveling-wave parametric amplifiers. Such devices are typically used as a first-stage readout amplifier for superconducting qubits in a cryogenic quantum computing environment. The nonlinear coefficients of different designs are evaluated as functions of an externally applied bias field, taking into account direct and external pumping schemes. Finally, we present results of the total gain for two different nonlinear transmission lines, one that is embedded with single Josephson junctions operating in four-wave mixing mode with direct pumping, and an externally pumped SNAIL-based amplifier operating in the three-wave mixing regime with a corresponding constant external flux bias. The gain is evaluated using a quantum circuit model including substrate losses and chromatic dispersion.
AB - In this paper, we present models for the nonlinearity of different nonlinear elements for superconducting Josephson traveling-wave parametric amplifiers. Such devices are typically used as a first-stage readout amplifier for superconducting qubits in a cryogenic quantum computing environment. The nonlinear coefficients of different designs are evaluated as functions of an externally applied bias field, taking into account direct and external pumping schemes. Finally, we present results of the total gain for two different nonlinear transmission lines, one that is embedded with single Josephson junctions operating in four-wave mixing mode with direct pumping, and an externally pumped SNAIL-based amplifier operating in the three-wave mixing regime with a corresponding constant external flux bias. The gain is evaluated using a quantum circuit model including substrate losses and chromatic dispersion.
KW - Josephson parametric amplifier
KW - SNAIL
KW - quantum computing
KW - qubit readout
KW - traveling-wave parametric amplifier
UR - http://www.scopus.com/inward/record.url?scp=85162207031&partnerID=8YFLogxK
U2 - 10.23919/EuCAP57121.2023.10133181
DO - 10.23919/EuCAP57121.2023.10133181
M3 - Conference contribution
AN - SCOPUS:85162207031
T3 - 17th European Conference on Antennas and Propagation, EuCAP 2023
BT - 17th European Conference on Antennas and Propagation, EuCAP 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 17th European Conference on Antennas and Propagation, EuCAP 2023
Y2 - 26 March 2023 through 31 March 2023
ER -