Amaral, Barbara LopesCabello Quintero, AdánCunha, Marcelo de Oliveira TerraAolita, Leandro2018-11-012018-11-012018AMARAL, B. L. et al. Noncontextual wirings. Physical Review Letters, v. 120, p. 130403, mar. 2018. Disponível em: <https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.130403>. Acesso em: 16 jun. 2018.10797114http://www.repositorio.ufop.br/handle/123456789/10502Contextuality is a fundamental feature of quantum theory necessary for certain models of quantum computation and communication. Serious steps have therefore been taken towards a formal framework for contextuality as an operational resource. However, the main ingredient of a resource theory—a concrete, explicit form of free operations of contextuality—was still missing. Here we provide such a component by introducing noncontextual wirings: a class of contextuality-free operations with a clear operational interpretation and a friendly parametrization. We characterize them completely for general black-box measurement devices with arbitrarily many inputs and outputs. As applications, we show that the relative entropy of contextuality is a contextuality monotone and that maximally contextual boxes that serve as contextuality bits exist for a broad class of scenarios. Our results complete a unified resource-theoretic framework for contextuality and Bell nonlocality.en-USrestritoArtigo publicado em periodicohttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.130403