154 citations · 578 across the 11 of their papers we have counts for
8 papers · 1 filter
Possibilities Determine the Combinatorial Structure of Probability Polytopes
Samson Abramsky, Rui Soares Barbosa, Kohei Kishida +2
We study the set of no-signalling empirical models on a measurement scenario, and show that the combinatorial structure of the no-signalling polytope is completely determined by th…
Contextuality, Cohomology and Paradox
Samson Abramsky, Rui Soares Barbosa, Kohei Kishida +2
Contextuality is a key feature of quantum mechanics that provides an important non-classical resource for quantum information and computation. Abramsky and Brandenburger used sheaf…
Non-locality in theories without the no-restriction hypothesis
Peter Janotta, Raymond Lal
The framework of generalized probabilistic theories (GPT) is a widely-used approach for studying the physical foundations of quantum theory. The standard GPT framework assumes the…
Theory-independent limits on correlations from generalised Bayesian networks
Joe Henson, Raymond Lal, Matthew F. Pusey
Bayesian networks provide a powerful tool for reasoning about probabilistic causation, used in many areas of science. They are, however, intrinsically classical. In particular, Bay…
On modifications of Reichenbach's principle of common cause in light of Bell's theorem
Eric G. Cavalcanti, Raymond Lal
Bell's 1964 theorem causes a severe problem for the notion that correlations require explanation, encapsulated in Reichenbach's Principle of Common Cause. Despite being a hallmark…
No -epistemic model can fully explain the indistinguishability of quantum states
Jonathan Barrett, Eric G. Cavalcanti, Raymond Lal +1
According to a recent no-go theorem (M. Pusey, J. Barrett and T. Rudolph, Nature Physics 8, 475 (2012)), models in which quantum states correspond to probability distributions over…
Generalized Probabilistic Theories Without the No-Restriction Hypothesis
Peter Janotta, Raymond Lal
The framework of generalized probabilistic theories (GPTs) is a popular approach for studying the physical foundations of quantum theory. The standard framework assumes the no-rest…
Time-asymmetry and causal structure
Bob Coecke, Raymond Lal
We consider devices with two inputs and two outputs, Alice and Bob each having access to one input and one output. To such a device we associate time-reverses by exchanging the rol…