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  • Conclusive quantum steering with superconducting transition-edge sensors

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    Author(s)
    Smith, Devin H
    Gillett, Geoff
    de Almeida, Marcelo P
    Branciard, Cyril
    Fedrizzi, Alessandro
    Weinhold, Till J
    Lita, Adriana
    Calkins, Brice
    Gerrits, Thomas
    Wiseman, Howard M
    Nam, Sae Woo
    White, Andrew G
    Griffith University Author(s)
    Wiseman, Howard M.
    Year published
    2012
    Metadata
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    Abstract
    Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up applications in quantum communication. To date, all experimental tests with single-photon states have relied on post selection, allowing untrusted devices to cheat by hiding unfavourable events in losses. Here we close this 'detection loophole' by combining a highly efficient source of entangled photon pairs with superconducting transition-edge sensors. We achieve an unprecedented ...
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    Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up applications in quantum communication. To date, all experimental tests with single-photon states have relied on post selection, allowing untrusted devices to cheat by hiding unfavourable events in losses. Here we close this 'detection loophole' by combining a highly efficient source of entangled photon pairs with superconducting transition-edge sensors. We achieve an unprecedented ~62% conditional detection efficiency of entangled photons and violate a steering inequality with the minimal number of measurement settings by 48 s.d.s. Our results provide a clear path to practical applications of steering and to a photonic loophole-free Bell test.
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    Journal Title
    Nature Communications
    Volume
    3
    DOI
    https://doi.org/10.1038/ncomms1628
    Copyright Statement
    © 2012 Nature Publishing Group. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
    Subject
    Quantum information, computation and communication
    Quantum optics and quantum optomechanics
    Publication URI
    http://hdl.handle.net/10072/46930
    Collection
    • Journal articles

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