5 papers · 1 filter
Bounding Classical and Quantum Correlations in Bayesian Networks with Quasiprobabilities
Paul Becsi, Matty J. Hoban
Bell's theorem reveals that quantum theory is in tension with classical causal reasoning and, in particular, the notion of local causality. This is now understood as a particular e…
Activation of post-quantum steering
Ana Belén Sainz, Paul Skrzypczyk, Matty J. Hoban
There are possible physical theories that give greater violations of Bell's inequalities than the corresponding Tsirelson bound, termed post-quantum non-locality. Such theories do…
A hierarchy of semidefinite programs for generalised Einstein-Podolsky-Rosen scenarios
Matty J. Hoban, Tom Drescher, Ana Belén Sainz
Correlations in Einstein-Podolsky-Rosen (EPR) scenarios, captured by \textit{assemblages} of unnormalised quantum states, have recently caught the attention of the community, both…
Activation of post-quantumness in bipartite generalised EPR scenarios
Beata Zjawin, Matty J. Hoban, Paul Skrzypczyk +1
In a standard bipartite Einstein-Podolsky-Rosen (EPR) scenario, Alice and Bob share a system prepared in an entangled state and Alice performs local measurements. One possible gene…
On estimating the entropy of shallow circuit outputs
Alexandru Gheorghiu, Matty J. Hoban
Estimating the entropy of probability distributions and quantum states is a fundamental task in information processing. Here, we examine the hardness of this task for the case of p…