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  • Complete experimental toolbox for alignment-free quantum communication

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    Author(s)
    D'Ambrosio, Vincenzo
    Nagali, Eleonora
    Walborn, Stephen P
    Aolita, Leandro
    Slussarenko, Sergei
    Marrucci, Lorenzo
    Sciarrino, Fabio
    Griffith University Author(s)
    Slussarenko, Sergei
    Year published
    2012
    Metadata
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    Abstract
    Quantum communication employs the counter-intuitive features of quantum physics for tasks that are impossible in the classical world. It is crucial for testing the foundations of quantum theory and promises to revolutionize information and communication technologies. However, to execute even the simplest quantum transmission, one must establish, and maintain, a shared reference frame. This introduces a considerable overhead in resources, particularly if the parties are in motion or rotating relative to each other. Here we experimentally show how to circumvent this problem with the transmission of quantum information encoded ...
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    Quantum communication employs the counter-intuitive features of quantum physics for tasks that are impossible in the classical world. It is crucial for testing the foundations of quantum theory and promises to revolutionize information and communication technologies. However, to execute even the simplest quantum transmission, one must establish, and maintain, a shared reference frame. This introduces a considerable overhead in resources, particularly if the parties are in motion or rotating relative to each other. Here we experimentally show how to circumvent this problem with the transmission of quantum information encoded in rotationally invariant states of single photons. By developing a complete toolbox for the efficient encoding and decoding of quantum information in such photonic qubits, we demonstrate the feasibility of alignment-free quantum key-distribution, and perform proof-of-principle demonstrations of alignment-free entanglement distribution and Bell-inequality violation. The scheme should find applications in fundamental tests of quantum mechanics and satellite-based quantum communication.
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    Journal Title
    Nature Communications
    Volume
    3
    DOI
    https://doi.org/10.1038/ncomms1951
    Copyright Statement
    © The Author(s) 2012. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) License (http://creativecommons.org/licenses/by-nc-nd/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited. You may not alter, transform, or build upon this work.
    Subject
    Atomic, molecular and optical physics not elsewhere classified
    Quantum information, computation and communication
    Quantum optics and quantum optomechanics
    Publication URI
    http://hdl.handle.net/10072/57603
    Collection
    • Journal articles

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