Simplicial distributions and contextuality

Thursday, January 19, 2023 3:00 pm - 4:00 pm EST

Simplicial distributions and contextuality

Math/CS Seminar Featuring Cihan Okay Bilkent University

In modern homotopy theory, spaces are represented by combinatorial models called simplicial sets. Their elegant formulation gives them great expressive power to capture spaces up to homotopy. Simplicial distributions are basic mathematical objects that mix simplicial sets with probabilities. That is, they model probability distributions on spaces. In my talk, I will show how simplicial distributions provide a framework for studying a central quantum feature associated with probabilities, known as contextuality. A typical measurement scenario consists of a set of measurements and outcomes, whereas simplicial distributions can be defined for spaces of measurements and outcomes. Our approach unifies and goes beyond two earlier approaches: the sheaf-theoretic (Abramsky-Brandenburger) and group cohomological (Okay-Roberts-Bartlett-Raussendorf).

 

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https://uwaterloo.zoom.us/j/99677204986?pwd=T3lMeWpPZWEwVE1Ba2ZCL3R0YS9WZz09

Meeting ID: 996 7720 4986
Passcode: 503711

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