Search Results for author: Robert W. Spekkens

Found 7 papers, 0 papers with code

Restricted Hidden Cardinality Constraints in Causal Models

no code implementations13 Sep 2021 Beata Zjawin, Elie Wolfe, Robert W. Spekkens

Causal models with unobserved variables impose nontrivial constraints on the distributions over the observed variables.

Entropic Inequality Constraints from $e$-separation Relations in Directed Acyclic Graphs with Hidden Variables

no code implementations15 Jul 2021 Noam Finkelstein, Beata Zjawin, Elie Wolfe, Ilya Shpitser, Robert W. Spekkens

Directed acyclic graphs (DAGs) with hidden variables are often used to characterize causal relations between variables in a system.

The Inflation Technique for Causal Inference with Latent Variables

no code implementations2 Sep 2016 Elie Wolfe, Robert W. Spekkens, Tobias Fritz

We describe an algorithm for deriving all such inequalities for the original causal structure that follow from ancestral independences in the inflation.

Causal Inference

Causal inference via algebraic geometry: feasibility tests for functional causal structures with two binary observed variables

no code implementations12 Jun 2015 Ciarán M. Lee, Robert W. Spekkens

We provide a scheme for inferring causal relations from uncontrolled statistical data based on tools from computational algebraic geometry, in particular, the computation of Groebner bases.

Causal Inference

Inferring causal structure: a quantum advantage

no code implementations19 Jun 2014 Katja Ried, Megan Agnew, Lydia Vermeyden, Dominik Janzing, Robert W. Spekkens, Kevin J. Resch

The problem of using observed correlations to infer causal relations is relevant to a wide variety of scientific disciplines.

Causal Inference Relation

Reference frames, superselection rules, and quantum information

no code implementations5 Oct 2006 Stephen D. Bartlett, Terry Rudolph, Robert W. Spekkens

Recently, there has been much interest in a new kind of ``unspeakable'' quantum information that stands to regular quantum information in the same way that a direction in space or a moment in time stands to a classical bit string: the former can only be encoded using particular degrees of freedom while the latter are indifferent to the physical nature of the information carriers.

Quantum Physics

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