Kochen-specker contextuality

C Budroni, A Cabello, O Gühne, M Kleinmann… - Reviews of Modern …, 2022 - APS
A central result in the foundations of quantum mechanics is the Kochen-Specker theorem. In
short, it states that quantum mechanics is in conflict with classical models in which the result …

Experimental certification of contextuality, coherence, and dimension in a programmable universal photonic processor

T Giordani, R Wagner, C Esposito, A Camillini… - Science …, 2023 - science.org
Quantum superposition of high-dimensional states enables both computational speed-up
and security in cryptographic protocols. However, the exponential complexity of tomographic …

Aspects of the phenomenology of interference that are genuinely nonclassical

L Catani, M Leifer, G Scala, D Schmid, RW Spekkens - Physical Review A, 2023 - APS
Interference phenomena are often claimed to resist classical explanation. However, such
claims are undermined by the fact that the specific aspects of the phenomenology upon …

Contextuality with vanishing coherence and maximal robustness to dephasing

VP Rossi, D Schmid, JH Selby, AB Sainz - Physical Review A, 2023 - APS
Generalized contextuality is a resource for a wide range of communication and information
processing protocols. However, contextuality is not possible without coherence, and so can …

Unscrambling the omelette of causation and inference: The framework of causal-inferential theories

D Schmid, JH Selby, RW Spekkens - arXiv preprint arXiv:2009.03297, 2020 - arxiv.org
Using a process-theoretic formalism, we introduce the notion of a causal-inferential theory: a
triple consisting of a theory of causal influences, a theory of inferences (of both the Boolean …

Kirkwood-Dirac representations beyond quantum states and their relation to noncontextuality

D Schmid, RD Baldijão, Y Yīng, R Wagner, JH Selby - Physical Review A, 2024 - APS
Kirkwood-Dirac representations of quantum states are increasingly finding use in many
areas within quantum theory. Usually, representations of this sort are only applied to provide …

Inequalities witnessing coherence, nonlocality, and contextuality

R Wagner, RS Barbosa, EF Galvão - Physical Review A, 2024 - APS
Quantum coherence, nonlocality, and contextuality are key resources for quantum
advantage in metrology, communication, and computation. We introduce a graph-based …

State independent contextuality advances one-way communication

D Saha, P Horodecki, M Pawłowski - New Journal of Physics, 2019 - iopscience.iop.org
Although'quantum contextuality'is one of the most fundamental non-classical feature, its
generic role in information processing and computation is an open quest. In this article, we …

Alternative robust ways of witnessing nonclassicality in the simplest scenario

M Khoshbin, L Catani, M Leifer - Physical Review A, 2024 - APS
In this paper we relate notions of nonclassicality in what is known as the simplest nontrivial
scenario (a prepare and measure scenario composed of four preparations and two binary …

Uniqueness of noncontextual models for stabilizer subtheories

D Schmid, H Du, JH Selby, MF Pusey - Physical Review Letters, 2022 - APS
We give a complete characterization of the (non) classicality of all stabilizer subtheories.
First, we prove that there is a unique nonnegative and diagram-preserving quasiprobability …