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  • Experimental Measurement-Device-Independent Quantum Steering and Randomness Generation beyond Qubits

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    Cavalcanti247046-Accepted.pdf (949.7Kb)
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    Accepted Manuscript (AM)
    Author(s)
    Guo, Yu
    Cheng, Shuming
    Hu, Xiaomin
    Liu, Bi-Heng
    Huang, En-Ming
    Huang, Yun-Feng
    Li, Chuan-Feng
    Guo, Guang-Can
    Cavalcanti, Eric G
    Griffith University Author(s)
    Cavalcanti, Eric G.
    Cheng, Shuming
    Year published
    2019
    Metadata
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    Abstract
    In a measurement-device-independent or quantum-refereed protocol, a referee can verify whether two parties share entanglement or Einstein-Podolsky-Rosen (EPR) steering without the need to trust either of the parties or their devices. The need for trusting a party is substituted by a quantum channel between the referee and that party, through which the referee encodes the measurements to be performed on that party's subsystem in a set of nonorthogonal quantum states. In this Letter, an EPR-steering inequality is adapted as a quantum-refereed EPR-steering witness, and the trust-free experimental verification of higher dimensional ...
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    In a measurement-device-independent or quantum-refereed protocol, a referee can verify whether two parties share entanglement or Einstein-Podolsky-Rosen (EPR) steering without the need to trust either of the parties or their devices. The need for trusting a party is substituted by a quantum channel between the referee and that party, through which the referee encodes the measurements to be performed on that party's subsystem in a set of nonorthogonal quantum states. In this Letter, an EPR-steering inequality is adapted as a quantum-refereed EPR-steering witness, and the trust-free experimental verification of higher dimensional quantum steering is reported via preparing a class of entangled photonic qutrits. Further, with two measurement settings, we extract 1.106±0.023 bits of private randomness per every photon pair from our observed data, which surpasses the one-bit limit for projective measurements performed on qubit systems. Our results advance research on quantum information processing tasks beyond qubits.
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    Journal Title
    Physical Review Letters
    Volume
    123
    Issue
    17
    DOI
    https://doi.org/10.1103/PhysRevLett.123.170402
    Funder(s)
    ARC
    Grant identifier(s)
    FT180100317
    Copyright Statement
    © 2019 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Mathematical sciences
    Physical sciences
    Foundations of quantum mechanics
    Quantum information, computation and communication
    quant-ph
    Publication URI
    http://hdl.handle.net/10072/389175
    Collection
    • Journal articles

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