5 papers · 1 filter
Precise 2D electric field density simulations for superconducting quantum devices
Zydrunas Gimbutas, Wei-Ren Syong, Nhi Nguyen +5
Dielectric loss due to two-level systems is a limiting factor for superconducting qubit relaxation times. These losses arise mostly from nanometer-scale interfacial defect regions…
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…
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…
Computed models of natural radiation backgrounds in qubits and superconducting detectors
Joseph Fowler, Ian Fogarty Florang, Nathan Nakamura +3
Naturally occurring radiation backgrounds cause correlated decoherence events in superconducting qubits. These backgrounds include both gamma rays produced by terrestrial radioisot…