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Paper detail

Post-quantum steering is a stronger-than-quantum resource for information processing

We present the first instance where post-quantum steering is a stronger-than-quantum resource for information processing -- remote state preparation. In addition, we show that the phenomenon of post-quantum steering is not just a mere mathematical curiosity allowed by the no-signalling principle, but it may arise within compositional theories beyond quantum theory, hence making its study fundamentally relevant. We show these results by formulating a new compositional general probabilistic theory -- which we call Witworld -- with strong post-quantum features, which proves to be a intuitive and useful tool for exploring steering and its applications beyond the quantum realm.

preprint2022arXivOpen access
Paulo J. CavalcantiJohn H. SelbyJamie SikoraThomas D. GalleyAna Belén Sainz
quant-ph
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Paulo J. CavalcantiJohn H. SelbyJamie SikoraThomas D. GalleyAna Belén Sainz

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