Venue
Program and Schedule
Organizers
Important Dates and Announcements
Welcome

Back to Schedule

Samson Abramsky

University College London, U.K., s.abramsky@ucl.ac.uk

Combining contextuality and causality I

(joint work with Rui Soares Barbosa and Amy Searle)

contextuality vs causality

In this talk, we describe ongoing work which develops a unified framework for studying contextuality and causality. This extends the sheaf-theoretic framework for contextuality introduced by Abramsky and Brandenburger, using ideas from computer science, in particular concrete data structures (Kahn-Plotkin) and event structures (Plotkin-Nielsen-Winskel), which have been used to model the causal unfoldings of sequential and concurrent computations. Our framework accommodates general contextuality scenarios on causal backgrounds, and allows for adaptive processes, such as feed-forward in measurement-based quantum computation. It also subsumes the description of classical causal networks. We extend the treatment of Bell inequalities, contextual fraction, and resource notions for contextuality to this general setting.

This talk provides an introduction to these ideas. Further developments will be described in the talk by Amy Searle.