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Showing 1–7 of 7 results
Advanced filters: Author: Cyril Branciard Clear advanced filters

  • Untrustworthy sources or detectors mean that quantum entanglement cannot always be ensured, but quantum steering inequalities can verify its presence. Using a highly efficient system, Smithet al. are able to close the detection loophole and clearly demonstrate steering between two parties.

    • Devin H. Smith
    • Geoff Gillett
    • Andrew G. White
    ResearchOpen Access
    Nature Communications
    Volume: 3, P: 1-6

  • The occurrence of Bell non-locality, observations that cannot be explained in terms of local influences, is one of the most remarkable features of quantum theory. A new test of non-locality, tailored for quantum networks, has now been implemented in a network with two independent quantum sources.

    • Cyril Branciard
    News & Views
    Nature Photonics
    Volume: 13, P: 662-663

  • Quantum theory can describe scenarios with an indefinite causal order, but whether such processes could be witnessed in real scenarios by violating causal inequalities is still subject to debate. Here, the authors give an affirmative answer, showing that noncausal processes admit a description using the framework of time-delocalised subsystems.

    • Julian Wechs
    • Cyril Branciard
    • Ognyan Oreshkov
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-14

  • Experiments have almost ruled out a classical explanation for entanglement, but it is possible that one event could influence a second if the influence occurs faster than the speed of light. The authors put experimental bounds on the speed of such hypothetical influences.

    • Daniel Salart
    • Augustin Baas
    • Hugo Zbinden
    Research
    Nature
    Volume: 454, P: 861-864