3 papers
quant-ph2025
Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
Lucas M. Janssen, Farzad Faramarzi, Henry G. LeDuc +5
Kinetic-inductance traveling-wave parametric amplifiers (KI-TWPAs) offer broadband near-quantum-limited amplification with high saturation power. Due to the high critical magnetic…
quant-ph2024
Quasiparticle effects in magnetic-field-resilient 3D transmons
J. Krause, G. Marchegiani, L. M. Janssen +3
Recent research shows that quasiparticle-induced decoherence of superconducting qubits depends on the superconducting-gap asymmetry originating from the different thicknesses of th…
quant-ph2024
Magnetic-field dependence of a Josephson traveling-wave parametric amplifier and integration into a high-field setup
L. M. Janssen, G. Butseraen, J. Krause +6
We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave parametric amplifier (TWPA). We show that the observed change in photonic bandgap and pla…