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Saturating the Maximum Success Probability Bound for Noiseless Linear Amplification using Linear Optics

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arxiv 2212.04274 v2 pith:GLXDEPCZ submitted 2022-12-08 quant-ph physics.optics

classification quant-phphysics.optics
keywords linearprobabilitysuccessamplificationamplifierboundmaximumnoiseless
verification ladder T0 review T1 audit T2 compute T3 formal
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A noiseless linear amplifier (NLA) performs the highest quality amplification allowable under the rules of quantum physics. Unfortunately, these same rules conspire against us via the no-cloning theorem, which constrains NLA operations to the domain of probabilistic processes. Nevertheless, they are useful for a wide variety of quantum protocols, with numerous proposals assuming access to an optimal NLA device which performs with the maximum possible success probability. Here we propose the first linear optics NLA protocol which asymptotically achieves this success probability bound, by modifying the Knill-Laflamme-Milburn near-deterministic teleporter into an amplifier.

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