168 citations · 370 across the 8 of their papers we have counts for
8 papers
Transient dynamics of a superconducting nonlinear oscillator
P. Bhupathi, Peter Groszkowski, M. P. DeFeo +3
We investigate the transient dynamics of a lumped-element oscillator based on a dc superconducting quantum interference device (SQUID). The SQUID is shunted with a capacitor formin…
Coherent-State Storage and Retrieval Between Superconducting Cavities Using Parametric Frequency Conversion
A. J. Sirois, M. A. Castellanos-Beltran, M. P. DeFeo +5
In superconducting quantum information, machined aluminum superconducting cavities have proven to be a well-controlled, low-dissipation electromagnetic environment for quantum circ…
Superconducting microstrip amplifiers with sub-Kelvin noise temperature near 4 GHz
M. P. DeFeo, B. L. T. Plourde
We present measurements of an amplifier operating at 3.8 GHz with 150 MHz of bandwidth based on the microstrip input-coil resonance of a dc superconducting quantum interference dev…
Microstrip superconducting quantum interference device amplifiers with submicron Josephson junctions: enhanced gain at gigahertz frequencies
M. P. DeFeo, P. Bhupathi, K. Yu +4
We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al-AlOx-Al Josephson junctions. The small junction size red…
Reducing microwave loss in superconducting resonators due to trapped vortices
C. Song, M. P. Defeo, K. Yu +1
Microwave resonators with high quality factors have enabled many recent breakthroughs with superconducting qubits and photon detectors, typically operated in shielded environments…
Microwave response of vortices in superconducting thin films of Re and Al
C. Song, T. W. Heitmann, M. P. DeFeo +5
Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At t…