24 citations · 24 across the 2 of their papers we have counts for
6 papers
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 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…
Multimode storage of quantum microwave fields in electron spins over 100 ms
V. Ranjan, J. O'Sullivan, E. Albertinale +8
A long-lived multi-mode qubit register is an enabling technology for modular quantum computing architectures. For interfacing with superconducting qubits, such a quantum memory sho…
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…
High-cooperativity coupling of a rare-earth spin ensemble to a superconducting resonator using yttrium orthosilicate as a substrate
Gavin Dold, Christoph W. Zollitsch, James O'Sullivan +6
Yttrium orthosilicate (YSiO, or YSO) has proved to be a convenient host for rare-earth ions used in demonstrations of microwave quantum memories and optical memories with m…
Dissipative discrete time crystals
James O'Sullivan, Oliver Lunt, Christoph W. Zollitsch +3
Periodically driven quantum systems host a range of non-equilibrium phenomena which are unrealizable at equilibrium. Discrete time-translational symmetry in a periodically driven m…