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William A. Coish
Researcher at McGill University
Publications - 77
Citations - 3533
William A. Coish is an academic researcher from McGill University. The author has contributed to research in topics: Qubit & Quantum dot. The author has an hindex of 23, co-authored 68 publications receiving 3163 citations. Previous affiliations of William A. Coish include University of Copenhagen & Kavli Institute for Theoretical Physics.
Papers
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14-Qubit entanglement: creation and coherence.
Thomas Monz,Philipp Schindler,Julio T. Barreiro,M. Chwalla,Daniel Nigg,William A. Coish,William A. Coish,Maximilian Harlander,W. Hänsel,Markus Hennrich,Rainer Blatt,Rainer Blatt +11 more
TL;DR: In this paper, the authors reported the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits by investigating the coherence of up to 8 ions over time and observed a decay proportional to the square of the number of qubits.
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Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
William A. Coish,Daniel Loss +1 more
TL;DR: In this paper, the generalized master equation (GME) was used to study the non-Markovian dynamics of a localized electron spin interacting with an environment of nuclear spins via the Fermi contact hyperfine interaction.
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Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
TL;DR: In this paper, the interaction of a heavy hole with nuclear spins in a quasi-two-dimensional III-V semiconductor quantum dot and the resulting dephasing of heavy-hole spin states was theoretically studied.
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Recipes for spin-based quantum computing
TL;DR: In this paper, the authors summarize past and very recent developments which point the way to spin-based quantum computing in the solid state, and provide a brief summary of some of the many theoretical proposals for solid-state quantum computers.
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Singlet-triplet decoherence due to nuclear spins in a double quantum dot
William A. Coish,Daniel Loss +1 more
TL;DR: In this article, the authors studied hyperfine-induced electron spin dynamics for two electrons confined to a double quantum dot and found that the long-time decay of a singlet-triplet correlator undergoes a transition from a rapid Gaussian to a slow power law (similar to 1/t(3/2)) when the exchange interaction becomes nonzero and the correlator acquires a phase shift given by a universal (parameter independent) value of 3 pi 4 at long times.