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Paper detail

Strong no-go theorem for Gaussian quantum bit commitment

Unconditionally secure bit commitment is forbidden by quantum mechanics. We extend this no-go theorem to continuous-variable protocols where both players are restricted to use Gaussian states and operations, which is a reasonable assumption in current-state optical implementations. Our Gaussian no-go theorem also provides a natural counter-example to a conjecture that quantum mechanics can be rederived from the assumption that key distribution is allowed while bit commitment is forbidden in Nature.

preprint2010arXivOpen access
Loïck MagninFrédéric MagniezAnthony LeverrierNicolas J. Cerf
quant-ph
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Loïck MagninFrédéric MagniezAnthony LeverrierNicolas J. Cerf

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