154 citations · 578 across the 11 of their papers we have counts for
11 papers
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…
Categorical Generalization and Physical Structuralism
Raymond Lal, Nicholas J. Teh
Category theory has become central to certain aspects of theoretical physics. Bain [Synthese, 190:1621--1635 (2013)] has recently argued that this has significance for ontic struct…
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 of probabilities versus relativistic causal structure: an arrow of time
Bob Coecke, Raymond Lal
There is an incompatibility between the symmetries of causal structure in relativity theory and the signaling abilities of probabilistic devices with inputs and outputs: while time…
Causal categories: relativistically interacting processes
Bob Coecke, Raymond Lal
A symmetric monoidal category naturally arises as the mathematical structure that organizes physical systems, processes, and composition thereof, both sequentially and in parallel.…
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…