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Updated: Jul 19, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Cooperative dynamics in coupled noisy dynamical systems near a critical point: The dc superconducting quantum
Antonio Palacios1, John Aven, Patrick Longhini
1Nonlinear Dynamical Systems Group, Department of Mathematics & Statistics, San Diego State University, San Diego, California 92182, USA. palacios@euler.sdsu.edu
Abstract:
Dynamical systems that operate near the onset of coupling-induced oscillations can exhibit enhanced sensitivity to external perturbations under suitable operating parameters. This cooperative behavior and the attendant enhancement in the system response (quantified here via a signal-to-noise ratio at the fundamental of the coupling-induced oscillation frequency) are investigated in this work. As a prototype, we study an array of dc superconducting quantum interference device (SQUID) rings locally coupled, unidirectionally as well as bidirectionally, in a ring configuration; it is well known that each individual SQUID can be biased through a saddle-node bifurcation to oscillatory behavior. We show that biasing the array near the bifurcation point of coupling-induced oscillations can lead to a significant performance enhancement.
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