Conformal Transformations as Observables
Abstract
C denotes either the conformal group in 3+1 dimensions, or in one chiral dimension. Let U be a unitary, strongly continuous representation of C satisfying the spectrum condition and inducing, by its adjoint action, automorphisms of a v.Neumann algebra A. We construct the unique inner representation U^A of the universal covering group of C implementing these automorphisms. U^A satisfies the spectrum condition and acts trivially on any U-invariant vector. This means in particular: Conformal transformations of a field theory having positive energy are weak limit points of local observables. Some immediate implications for chiral subnets are given. We propose the name ``Borchers-Sugawara construction''.
Cite
@article{arxiv.math-ph/0201016,
title = {Conformal Transformations as Observables},
author = {Soeren Koester},
journal= {arXiv preprint arXiv:math-ph/0201016},
year = {2011}
}
Comments
13 pages, no figures; analysis now covers conformal group of Minkowski space, minor additions, some typos corrected