6 papers
Typicality of Contextuality
Vinicius P. Rossi, Beata Zjawin, Roberto D. Baldijão +5
Identifying when observed statistics cannot be explained by any reasonable classical model is a central problem in quantum foundations. A principled and universally applicable appr…
Decoupling local classicality from classical explainability: A noncontextual model for bilocal classical theory and a locally-classical but contextual theory
Sina Soltani, Marco Erba, David Schmid +1
We construct an ontological model for the theory known as bilocal classical theory doi.org/10.1103/PhysRevA.102.052216. To our knowledge, this is only the second time that an ontol…
Tomographically-nonlocal entanglement
Roberto D. Baldijão, Marco Erba, David Schmid +2
Entanglement is a central and subtle feature of quantum theory, whose structure and operational behavior can change dramatically when additional physical constraints, such as symme…
Shadows and subsystems of generalized probabilistic theories: when tomographic incompleteness is not a loophole for contextuality proofs
David Schmid, John H. Selby, Vinicius P. Rossi +2
It is commonly believed that failures of tomographic completeness undermine assessments of nonclassicality in noncontextuality experiments. In this work, we study how such failures…
A structure theorem for complex-valued quasiprobability representations of physical theories
Rafael Wagner, Roberto D. Baldijão, Matthias Salzger +3
Quasiprobability representations are well-established tools in quantum information science, with applications ranging from the classical simulability of quantum computation to quan…
Noncontextual ontological models of operational probabilistic theories
Sina Soltani, Marco Erba, David Schmid +1
An experiment or theory is classically explainable if it can be reproduced by some noncontextual ontological model. In this work, we adapt the notion of ontological models and gene…