High threshold distributed quantum computing with three-qubit nodes
Open Access
- 1 September 2012
- journal article
- Published by IOP Publishing in New Journal of Physics
- Vol. 14 (9), 093008
- https://doi.org/10.1088/1367-2630/14/9/093008
Abstract
In the distributed quantum computing paradigm, well-controlled few-qubit 'nodes' are networked together by connections which are relatively noisy and failure prone. A practical scheme must offer high tolerance to errors while requiring only simple (i.e. few-qubit) nodes. Here we show that relatively modest, three-qubit nodes can support advanced purification techniques and so offer robust scalability: the infidelity in the entanglement channel may be permitted to approach 10% if the infidelity in local operations is of order 0.1%. Our tolerance of network noise is therefore an order of magnitude beyond prior schemes, and our architecture remains robust even in the presence of considerable decoherence rates (memory errors). We compare the performance with that of schemes involving nodes of lower and higher complexity. Ion traps, and NV-centres in diamond, are two highly relevant emerging technologies: they possess the requisite properties of good local control, rapid and reliable readout, and methods for entanglement-at-a-distance.Keywords
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This publication has 26 references indexed in Scilit:
- Quantum Interference of Single Photons from Remote Nitrogen-Vacancy Centers in DiamondPhysical Review Letters, 2012
- Two-Photon Quantum Interference from Separate Nitrogen Vacancy Centers in DiamondPhysical Review Letters, 2012
- Natural and artificial atoms for quantum computationReports on Progress in Physics, 2011
- Robust and scalable scheme to generate large-scale entanglement websPhysical Review A, 2011
- Quantum computersNature, 2010
- Distributed quantum computation based on small quantum registersPhysical Review A, 2007
- Entanglement of single-atom quantum bits at a distanceNature, 2007
- Measurement-induced entanglement for excitation stored in remote atomic ensemblesNature, 2005
- Optical generation of matter qubit graph statesNew Journal of Physics, 2005
- Power of One Bit of Quantum InformationPhysical Review Letters, 1998