329 citations · 602 across the 7 of their papers we have counts for
8 papers
Optimal robust single-qubit gates in superconducting quantum processors
Tangyou Huang, Anuj Aggarwal, Jingjun Zhu +11
Fault-tolerant quantum computing requires high-fidelity quantum gates that are resilient to control errors and device imperfections. Here, we develop energy-optimal control pulses…
Stability of superconducting resonators: motional narrowing and the role of Landau-Zener driving of two-level defects
David Niepce, Jonathan J. Burnett, Marina Kudra +2
Frequency instability of superconducting resonators and qubits leads to dephasing and time-varying energy-loss and hinders quantum-processor tune-up. Its main source is dielectric…
High Quality 3-Dimensional Aluminum Microwave Cavities
M. Kudra, J. Biznárová, F. Roudsari +5
We present a comprehensive study of internal quality factors in superconducting stub-geometry 3-dimensional cavities made of aluminum. We use wet etching, annealing and electrochem…
Geometric Scaling of Two-Level-System Loss in Superconducting Resonators
David Niepce, Jonathan Burnett, Martí Gutierrez Latorre +1
We perform an experimental and numerical study of dielectric loss in superconducting microwave resonators at low temperature. Dielectric loss, due to two-level systems, is a limiti…
On the Angular Dependence of InP High Electron Mobility Transistors for Cryogenic Low Noise Amplifiers in a Magnetic Field
Isabel Harrysson Rodrigues, David Niepce, Arsalan Pourkabirian +4
The InGaAs-InAlAs-InP high electron mobility transistor (InP HEMT) is the preferred active device used in a cryogenic low noise amplifier (LNA) for sensitive detection of microwave…
Decoherence benchmarking of superconducting qubits
Jonathan Burnett, Andreas Bengtsson, Marco Scigliuzzo +4
We benchmark the decoherence of superconducting qubits to examine the temporal stability of energy-relaxation and dephasing. By collecting statistics during measurements spanning m…
High Kinetic Inductance NbN Nanowire Superinductors
David Niepce, Jonathan Burnett, Jonas Bylander
We demonstrate that a high kinetic inductance disordered superconductor can realize a low microwave loss, non-dissipative circuit element with an impedance greater than the quantum…
Noise and loss of superconducting aluminium resonators at single photon energies
Jonathan Burnett, Andreas Bengtsson, David Niepce +1
The loss and noise mechanisms of superconducting resonators are useful tools for understanding decoherence in superconducting circuits. While the loss mechanisms have been heavily…