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Title: Measurement-based entanglement under conditions of extreme photon loss
Authors: Campbell, E.T.
Benjamin, S.C. 
Issue Date: 24-Sep-2008
Citation: Campbell, E.T., Benjamin, S.C. (2008-09-24). Measurement-based entanglement under conditions of extreme photon loss. Physical Review Letters 101 (13) : -. ScholarBank@NUS Repository.
Abstract: The act of measuring optical emissions from two remote qubits can entangle them. By demanding that a photon from each qubit reaches the detectors, one can ensure that no photon was lost. But retaining both photons is rare when loss rates are high, as in Moehring et al. where 30 successes occurred per 109 attempts. We describe a means to exploit the low grade entanglement heralded by the detection of a lone photon: A subsequent perfect operation is quickly achieved by consuming this noisy resource. We require only two qubits per node, and can tolerate both path length variation and loss asymmetry. The impact of photon loss upon the failure rate is then linear; realistic high-loss devices can gain orders of magnitude in performance and thus support quantum computing. © 2008 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.101.130502
Appears in Collections:Staff Publications

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