4 papers · 1 filter
An Unbounded Separation of Almost-Quantum and Commuting-Operator Correlations in Zero-Error Communication
Rafiuddin Gazi, Biswadeep Chatterjee, Jayashree Karmakar +3
Almost-quantum correlations form the level of the Navascués--Pironio--Acín hierarchy. They strictly contain the quantum set, are characterized by a single semidefin…
All-vs-Nothing Operational Manifestation of Preparation Contextuality
Jayashree Karmakar, Rafiuddin Gazi, Biswadeep Chatterjee +4
Preparation contextuality is often manifested operationally through a quantitative advantage over preparation-noncontextual models in information-processing tasks, yet quantum theo…
On the Origin of Beyond-Classical Advantage in the Parity-Permutation Problem
Jayashree Karmakar, Biswadeep Chatterjee, Rafiuddin Gazi +6
We investigate the task of identifying the parity (odd vs even) of an unknown permutation applied to particles. Classically, using fewer than distinct labels per particle l…
Emergence and Recovery of (logical) Kochen-Specker Contextuality via Hamilton Extension
Jayashree Karmakar, Biswadeep Chatterjee, Rafiuddin Gazi +5
Logical Kochen-Specker (KS) contextuality is widely regarded as an intrinsic property of specially constructed measurement configurations. We show instead that it can emerge from K…