Fusion of defects

Author: 

Bartels, A
Douglas, C
Henriques, A

Publication Date: 

20 February 2019

Journal: 

Memoirs of the American Mathematical Society

Last Updated: 

2020-06-23T04:02:40.643+01:00

Issue: 

1237

Volume: 

258

DOI: 

10.1090/memo/1237

abstract: 

Conformal nets provide a mathematical model for conformal field theory. We define a notion of defect between conformal nets, formalizing the idea of an interaction between two conformal field theories. We introduce an operation of fusion of defects, and prove that the fusion of two defects is again a defect, provided the fusion occurs over a conformal net of finite index. There is a notion of sector (or bimodule) between two defects, and operations of horizontal and vertical fusion of such sectors. Our most difficult technical result is that the horizontal fusion of the vacuum sectors of two defects is isomorphic to the vacuum sector of the fused defect. Equipped with this isomorphism, we construct the basic interchange isomorphism between the horizontal fusion of two vertical fusions and the vertical fusion of two horizontal fusions of sectors.

Symplectic id: 

668625

Submitted to ORA: 

Submitted

Publication Type: 

Book

ISBN-13: 

9781470450656