Causally Disjoint Discs: Another $$\mathbb {E}_n$$-Operad
Abstract
Abstract Motivated by (perturbative) quantum observables in Lorentzian signature we define a new operad: the operad of causally disjoint disks. In order to describe this operad we use the orthogonal categories of Benini, Schenkel, and Woike and the prefactorization functor of Benini, Carmona, Grant-Stuart, and Schenkel. Along the way we extend these constructions to the topological setting, i.e., (multi-)categories enriched over spaces.
Fields of Study & Subjects
Advanced Topics in Algebra
Advanced Operator Algebra Research
Homotopy and Cohomology in Algebraic Topology
Publication details
- Journal / source
- Applied Categorical Structures
- Publisher
- Springer Science and Business Media LLC
- Volume
- 34
- Issue
- 4
- Publication date
- 19 May 2026
- Language
- EN