7 papers
Multi-stage Quantum Amplifier Readout Chain
Logan Howe, Andrea Giachero, Michael Vissers +5
Multi-stage cryogenic readout chains with a wide bandwidth and added noise within a few quanta of the quantum limit are frequently constructed using traveling-wave parametric ampli…
Coherence-limited digital control of a superconducting qubit using a Josephson pulse generator at 3 K
M. A. Castellanos-Beltran, A. J. Sirois, L. Howe +4
Compared to traditional semiconductor control electronics (TSCE) located at room temperature, cryogenic single flux quantum (SFQ) electronics can provide qubit measurement and cont…
Kinetic Inductance Traveling Wave Parametric Amplifiers Near the Quantum Limit: Methodology and Characterization
L. Howe, A. Giachero, M. Vissers +7
We present a detailed simulation and design framework for realizing traveling wave parametric amplifiers (TWPAs) using the nonlinear kinetic inductance of disordered superconductor…
Picosecond Josephson Samplers: Modeling and Measurements
Logan Howe, Bart van Zeghbroeck, David Olaya +4
Measurement of signals generated by superconducting Josephson junction (JJ) circuits require ultra-fast components located in close proximity to the generating circuitry. We report…
Compact Superconducting Kinetic Inductance Traveling Wave Parametric Amplifiers with On-chip rf Components
Logan Howe, Andrea Giachero, Michael Vissers +4
Quantum computing systems and fundamental physics experiments using superconducting technologies frequently require signal amplification chains operating near the quantum limit of…
Measurable Improvement in Multi-Qubit Readout Using a Kinetic Inductance Traveling Wave Parametric Amplifier
M. A. Castellanos-Beltran, L. Howe, A. Giachero +4
Increasing the size and complexity of quantum information systems requires highly-multiplexed readout architectures, as well as amplifier chains operating near the quantum limit (Q…