5 papers
Joint measurability structures realizable with qubit measurements: incompatibility via marginal surgery
Nikola Andrejic, Ravi Kunjwal
Measurements in quantum theory exhibit incompatibility, i.e., they can fail to be jointly measurable. An intuitive way to represent the (in)compatibility relations among a set of m…
The Characterization of Noncontextuality in the Framework of Generalized Probabilistic Theories
David Schmid, John Selby, Elie Wolfe +2
To make precise the sense in which the operational predictions of quantum theory conflict with a classical worldview, it is necessary to articulate a notion of classicality within…
Quantifying Bell: the Resource Theory of Nonclassicality of Common-Cause Boxes
Elie Wolfe, David Schmid, Ana Belén Sainz +2
We take a resource-theoretic approach to the problem of quantifying nonclassicality in Bell scenarios. The resources are conceptualized as probabilistic processes from the setting…
Anomalous weak values and contextuality: robustness, tightness, and imaginary parts
Ravi Kunjwal, Matteo Lostaglio, Matthew F. Pusey
Weak values are quantities accessed through quantum experiments involving weak measurements and post-selection. It has been shown that 'anomalous' weak values (those lying beyond t…
Hypergraph framework for irreducible noncontextuality inequalities from logical proofs of the Kochen-Specker theorem
Ravi Kunjwal
Kochen-Specker (KS) theorem reveals the inconsistency between quantum theory and any putative underlying model of it satisfying the constraint of KS-noncontextuality. A logical pro…