47 citations · 117 across the 9 of their papers we have counts for
9 papers
Design and Operation of Wafer-Scale Packages Containing >500 Superconducting Qubits
Oscar W. Kennedy, Waqas Ahmad, Robert Armstrong +14
Packages capable of supporting large arrays of high-coherence superconducting qubits are vital for the realisation of fault-tolerant quantum computers and the necessary high-throug…
A Depinning Model for Josephson Junction Tuning
Oscar W. Kennedy, Jared H. Cole, Connor D. Shelly
Building more powerful quantum computers requires manufacturing processes with tight tolerances. To improve the tolerances on Josephson junctions, techniques to fine tune their pro…
Analysis of Josephson Junction Barrier Variation: A Combined Electron Microscopy, Breakdown and Monte-Carlo Approach
Oscar W. Kennedy, Kevin G. Crawford, Kowsar Shahbazi +1
Josephson junctions manufactured to tight tolerances are necessary components for superconducting quantum computing. Developing precise manufacturing techniques for Josephson junct…
Integration of through-sapphire substrate machining with superconducting quantum processors
Narendra Acharya, Robert Armstrong, Yashwanth Balaji +7
We demonstrate a sapphire machining process integrated with intermediate-scale quantum processors. The process allows through-substrate electrical connections, necessary for low-fr…
Electron-beam annealing of Josephson junctions for frequency tuning of quantum processors
Yashwanth Balaji, Narendra Acharya, Robert Armstrong +7
Superconducting qubits are a promising route to achieving large-scale quantum computers. A key challenge in realising large-scale superconducting quantum processors involves mitiga…
Hybrid Quantum Interferometer in Bifurcation Mode as a Latching Quantum Readout
Connor D Shelly, Christopher Checkley, Victor T Petrashov
We have developed a new type of magnetometer consisting of a Hybrid Quantum Interference Device (HyQUID) that is set in a bi-stable state. We demonstrate its operation in a latchin…
Capturing Complex Behaviour in Josephson Travelling Wave Parametric Amplifiers
Tom Dixon, Jacob W. Dunstan, George B. Long +3
We present an analysis of wave-mixing in recently developed Josephson Travelling Wave Parametric Amplifiers (JTWPAs). Circuit simulations performed using WRspice show the full beha…
Existence of Shapiro Steps in the Dissipative Regime in Superconducting Weak Links
Connor D. Shelly, Patrick See, Ivan Rungger +1
We present measurements of microwave-induced Shapiro steps in a superconducting nanobridge weak link in the dissipative branch of a hysteretic current-voltage characteristic. We de…
Resolving thermoelectric paradox in superconductors
C. D. Shelly, E. A. Matrozova, V. T. Petrashov
For almost a century thermoelectricity in superconductors has been one of the most intriguing topics of physics. At the early stages in the 1920s, the mere existence of thermoelect…