The type-independent resource theory of local operations and shared randomness

David Schmid; Denis Rosset; Francesco Buscemi

doi:10.22331/q-2020-04-30-262

The type-independent resource theory of local operations and shared randomness

David Schmid^1,2, Denis Rosset¹, and Francesco Buscemi³

¹Perimeter Institute for Theoretical Physics, 31 Caroline St. N, Waterloo, Ontario, N2L 2Y5, Canada
²Institute for Quantum Computing and Dept. of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
³Graduate School of Informatics, Nagoya University, Chikusa-ku, 464-8601 Nagoya, Japan

Published:	2020-04-30, volume 4, page 262
Eprint:	arXiv:1909.04065v7
Doi:	https://doi.org/10.22331/q-2020-04-30-262
Citation:	Quantum 4, 262 (2020).

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Abstract

In space-like separated experiments and other scenarios where multiple parties share a classical common cause but no cause-effect relations, quantum theory allows a variety of nonsignaling resources which are useful for distributed quantum information processing. These include quantum states, nonlocal boxes, steering assemblages, teleportages, channel steering assemblages, and so on. Such resources are often studied using nonlocal games, semiquantum games, entanglement-witnesses, teleportation experiments, and similar tasks. We introduce a unifying framework which subsumes the full range of nonsignaling resources, as well as the games and experiments which probe them, into a common resource theory: that of local operations and shared randomness (LOSR). Crucially, we allow these LOSR operations to locally change the type of a resource, so that players can convert resources of $any$ type into resources of any other type, and in particular into strategies for the specific type of game they are playing. We then prove several theorems relating resources and games of different types. These theorems generalize a number of seminal results from the literature, and can be applied to lessen the assumptions needed to characterize the nonclassicality of resources. As just one example, we prove that semiquantum games are able to perfectly characterize the LOSR nonclassicality of every resource of $any$ type (not just quantum states, as was previously shown). As a consequence, we show that any resource can be characterized in a measurement-device-independent manner.

► BibTeX data

@article{Schmid2020typeindependent,
  doi = {10.22331/q-2020-04-30-262},
  url = {https://doi.org/10.22331/q-2020-04-30-262},
  title = {The type-independent resource theory of local operations and shared randomness},
  author = {Schmid, David and Rosset, Denis and Buscemi, Francesco},
  journal = {{Quantum}},
  issn = {2521-327X},
  publisher = {{Verein zur F{\"{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}},
  volume = {4},
  pages = {262},
  month = apr,
  year = {2020}
}

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The type-independent resource theory of local operations and shared randomness

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