Contextuality, Cohomology and Paradox

Understand

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 theory to give a general treatment of contextuality in quantum theory [New Journal of Physics 13 (2011) 113036].
• However, contextual phenomena are found in other fields as well, for example database theory.
• In this paper, we shall develop this unified view of contextuality.