no code implementations • 13 Sep 2021 • Beata Zjawin, Elie Wolfe, Robert W. Spekkens
Causal models with unobserved variables impose nontrivial constraints on the distributions over the observed variables.
no code implementations • 15 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.
no code implementations • 12 May 2021 • Rafael Chaves, George Moreno, Emanuele Polino, Davide Poderini, Iris Agresti, Alessia Suprano, Mariana R. Barros, Gonzalo Carvacho, Elie Wolfe, Askery Canabarro, Robert W. Spekkens, Fabio Sciarrino
Bell's theorem is typically understood as the proof that quantum theory is incompatible with local-hidden-variable models.
no code implementations • 2 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.
no code implementations • 12 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.
no code implementations • 19 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.
no code implementations • 5 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