815 citations · 8.1k across the 75 of their papers we have counts for
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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…
Dispersive readout of reconfigurable ambipolar quantum dots in a silicon-on-insulator nanowire
Jingyu Duan, Janne S. Lehtinen, Michael A. Fogarty +8
We report on ambipolar gate-defined quantum dots in silicon on insulator (SOI) nanowires fabricated using a customised complementary metal-oxide-semiconductor (CMOS) process. The a…
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…
Spin readout of a CMOS quantum dot by gate reflectometry and spin-dependent tunnelling
V. N. Ciriano-Tejel, M. A. Fogarty, S. Schaal +8
Silicon spin qubits are promising candidates for realising large scale quantum processors, benefitting from a magnetically quiet host material and the prospects of leveraging the m…
Electron Spin Resonance of P Donors in Isotopically Purified Si Detected by Contactless Photoconductivity
Philipp Ross, Brendon C. Rose, Cheuk C. Lo +4
Coherence times of electron spins bound to phosphorus donors have been measured, using a standard Hahn echo technique, to be up to 20 ms in isotopically pure silicon with [P]$ = 10…
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…
Conditional dispersive readout of a CMOS quantum dot via an integrated transistor circuit
S. Schaal, S. Barraud, J. J. L. Morton +1
Quantum computers require interfaces with classical electronics for efficient qubit control, measurement and fast data processing. Fabricating the qubit and the classical control l…
Nuclear spin decoherence of neutral P donors in silicon: Effect of environmental Si nuclei
Evan S. Petersen, Alexei M. Tyryshkin, John J. L. Morton +5
Spectral diffusion arising from Si nuclear spin flip-flops, known to be a primary source of electron spin decoherence in silicon, is also predicted to limit the coherence ti…
Spin relaxation and donor-acceptor recombination of Se in 28-silicon
Roberto Lo Nardo, Gary Wolfowicz, Stephanie Simmons +9
Selenium impurities in silicon are deep double donors and their optical and electronic properties have been recently investigated due to their application for infrared detection. H…
Hyperfine Stark effect of shallow donors in silicon
G. Pica, G. Wolfowicz, M. Urdampilleta +9
We present a complete theoretical treatment of Stark effects in doped silicon, whose predictions are supported by experimental measurements. A multi-valley effective mass theory, d…
Fast, low-power manipulation of spin ensembles in superconducting microresonators
Anthony J. Sigillito, Hans Malissa, Alexei M. Tyryshkin +10
We demonstrate the use of high-Q superconducting coplanar waveguide (CPW) microresonators to perform rapid manipulations on a randomly distributed spin ensemble using very low micr…
Uncovering many-body correlations in nanoscale nuclear spin baths by central spin decoherence
Wen-Long Ma, Gary Wolfowicz, Nan Zhao +3
Many-body correlations can yield key insights into the nature of interacting systems; however, detecting them is often very challenging in many-particle physics, especially in nano…
A single-atom electron spin qubit in silicon
Jarryd J. Pla, Kuan Y. Tan, Juan P. Dehollain +5
A single atom is the prototypical quantum system, and a natural candidate for a quantum bit - the elementary unit of a quantum computer. Atoms have been successfully used to store…
Quantum bath-driven decoherence of mixed spin systems
S. J. Balian, Gary Wolfowicz, John J. L. Morton +1
The decoherence of mixed electron-nuclear spin qubits is a topic of great current importance, but understanding is still lacking: while important decoherence mechanisms for spin qu…
High-fidelity readout and control of a nuclear spin qubit in silicon
Jarryd J. Pla, Kuan Y. Tan, Juan P. Dehollain +6
A single nuclear spin holds the promise of being a long-lived quantum bit or quantum memory, with the high fidelities required for fault-tolerant quantum computing. We show here th…