259 citations · 471 across the 8 of their papers we have counts for
9 papers
Fast Microwave-free State Preparation and Measurement of Superconducting Qubits
R. Abraham, F. Amet, P. Anderson +212
Fast, high-fidelity, scalable state preparation and measurement is critical to the realization of a quantum computing system. The state-of-the-art methods for preparation and reado…
Fast, Lifetime-Preserving Readout for High-Coherence Quantum Annealers
Jeffrey A. Grover, James I. Basham, Alexander Marakov +15
We demonstrate, for the first time, that a quantum flux parametron (QFP) is capable of acting as both isolator and amplifier in the readout circuit of a capacitively shunted flux q…
Second-harmonic current-phase relation in Josephson junctions with ferromagnetic barriers
M. J. A. Stoutimore, A. N. Rossolenko, V. V. Bolginov +7
We report the observation of a current-phase relation dominated by the second Josephson harmonic in superconductor-ferromagnet-superconductor junctions. The exotic current-phase re…
Reproducible Operating Margins on a 72,800-Device Digital Superconducting Chip
Quentin P. Herr, Joshua Osborne, Micah J. A. Stoutimore +6
We report the design and test of Reciprocal Quantum Logic shift-register yield vehicles consisting of up to 72,800 Josephson junction devices per die, the largest digital supercond…
Landau-Zener population control and dipole measurement of a two level system bath
M. S. Khalil, S. Gladchenko, M. J. A. Stoutimore +3
Tunneling two level systems (TLS), present in dielectrics at low temperatures, have been recently studied for fundamental understanding and superconducting device development. Acco…
Evidence for hydrogen two-level systems in atomic layer deposition oxides
M. S. Khalil, M. J. A. Stoutimore, S. Gladchenko +10
Two-level system (TLS) defects in dielectrics are known to limit the performance of electronic devices. We study TLS using millikelvin microwave loss measurements of three atomic l…
A Josephson junction defect spectrometer for measuring two-level systems
M. J. A. Stoutimore, M. S. Khalil, C. J. Lobb +1
We have fabricated and measured Josephson junction defect spectrometers (JJDSs), which are frequency-tunable, nearly-harmonic oscillators that probe strongly-coupled two-level syst…
An analysis method for asymmetric resonator transmission applied to superconducting devices
M. S. Khalil, M. J. A. Stoutimore, F. C. Wellstood +1
We examine the transmission through nonideal microwave resonant circuits. The general analytical resonance line shape is derived for both inductive and capacitive coupling with mis…
Imaging spontaneous currents in superconducting arrays of pi-junctions
Sergey M. Frolov, Micah J. A. Stoutimore, Trevis A. Crane +6
Superconductors separated by a thin tunneling barrier exhibit the Josephson effect that allows charge transport at zero voltage, typically with no phase shift between the supercond…