39 citations · 211 across the 14 of their papers we have counts for
14 papers
Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime
Joseph Alexander, Gavin Dold, Oscar W. Kennedy +9
Rare-earth doped crystals have long coherence times and the potential to provide quantum interfaces between microwave and optical photons. Such applications benefit from a high coo…
Probing spin dynamics of ultra-thin van der Waals magnets via photon-magnon coupling
Christoph W. Zollitsch, Safe Khan, Vu Thanh Trung Nam +9
Layered van der Waals (vdW) magnets can maintain a magnetic order even down to the single-layer regime and hold promise for integrated spintronic devices. While the magnetic ground…
Reducing strain in heterogeneous quantum devices using atomic layer deposition
Oscar W. Kennedy, James O'Sullivan, Christoph W. Zollitsch +3
We investigated the use of dielectric layers produced by atomic layer deposition (ALD) as an approach to strain mitigation in composite silicon/superconductor devices operating at…
Spin coherence of near-surface ionised Te donors in silicon
Mantas Šimėnas, James O'Sullivan, Oscar W. Kennedy +8
Impurity spins in crystal matrices are promising components in quantum technologies, particularly if they can maintain their spin properties when close to surfaces and material int…
Electric-field-driven conductance switching in encapsulated graphene nanogaps
E. Pyurbeeva, J. L. Swett, Q. Ye +2
Feedback-controlled electric breakdown of graphene in air or vacuum is a well-established way of fabricating tunnel junctions, nanogaps, and quantum dots. We show that the method i…
Random-access quantum memory using chirped pulse phase encoding
James O'Sullivan, Oscar W. Kennedy, Kamanasish Debnath +9
As in conventional computing, key attributes of quantum memories are high storage density and, crucially, random access, or the ability to read from or write to an arbitrarily chos…
Nonlinear quantum processes in superconducting resonators terminated by neon-focused-ion-beam-fabricated superconducting nanowires
Jamie A. Potter, Oscar W. Kennedy, Jonathan C. Fenton +1
We have used a neon focused-ion-beam to fabricate both nanoscale Nb Dayem bridges and NbN phase-slip nanowires located at the short-circuited end of quarter-wavelength coplanar wav…
Rapid Thermal Annealing for Surface Optimisation of ZnO Substrates for MBE-Grown Oxide Two-Dimensional Electron Gases
Matthew Sparks, Oscar Kennedy, Paul Warburton
Two-dimensional electron gases (2DEGs) at the ZnO/ZnMgO interface are promising for applications in spintronics and quantum computing due to the combination of low spin-orbit coupl…
Spin resonance linewidths of bismuth donors in silicon coupled to planar microresonators
James O'Sullivan, Oscar W. Kennedy, Christoph W. Zollitsch +5
Ensembles of bismuth donor spins in silicon are promising storage elements for microwave quantum memories due to their long coherence times which exceed seconds. Operating an effic…
Integration of topological insulator Josephson junctions in superconducting qubit circuits
Tobias W. Schmitt, Malcolm R. Connolly, Michael Schleenvoigt +16
The integration of semiconductor Josephson junctions (JJs) in superconducting quantum circuits provides a versatile platform for hybrid qubits and offers a powerful way to probe ex…
Tuning high-Q superconducting resonators by magnetic field reorientation
Christoph W. Zollitsch, James O'Sullivan, Oscar W. Kennedy +2
Superconducting resonators interfaced with paramagnetic spin ensembles are used to increase the sensitivity of electron spin resonance experiments and are key elements of microwave…
Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID
Oscar W. Kennedy, Jonathan Burnett, Jonathan C. Fenton +4
Hybrid superconducting--spin systems offer the potential to combine highly coherent atomic quantum systems with the scalability of superconducting circuits. To fully exploit this p…
Emergence of Quantum Phase-Slip Behaviour in Superconducting NbN Nanowires: DC Electrical Transport and Fabrication Technologies
N. G. N. Constantino, M. S. Anwar, O. W. Kennedy +3
Superconducting nanowires undergoing quantum phase-slips have potential for impact in electronic devices, with a high-accuracy quantum current standard among a possible toolbox of…
Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam
Jonathan Burnett, James Sagar, Oscar W. Kennedy +2
We present low-temperature measurements of low-loss superconducting nanowire-embedded resonators in the low-power limit relevant for quantum circuits. The superconducting resonator…