Euclidean field theory on a sphere

Details Euclidean field theory on a sphere Euclidean field theory on a sphere

1999-12-23

arxiv.org/abs/hep-th/9912235v1

Physics

High Energy Physics

High Energy Physics - Theory

20 pages

Scientific paper

This paper is concerned with a structural analysis of euclidean field theories on the euclidean sphere. In the first section we give proposal for axioms for a euclidean field theory on a sphere in terms of C*-algebras. Then, in the second section, we investigate the short-distance behavior of euclidean field theory models on the sphere by making use of the concept of {\em scaling algebras}, which has first been introduced by D. Buchholz, and R. Verch and which has also be applied to euclidean field theories on flat euclidean space in a previous paper. We establish the expected statement that that scaling limit theories of euclidean field theories on a sphere are euclidean field theories on flat euclidean space. Keeping in mind that the minkowskian analogue of the euclidean sphere is the de Sitter space, we develop a Osterwalder-Schrader type construction scheme which assigns to a given euclidean field theory on the sphere a quantum field theory on de Sitter space. We show that the constructed quantum field theoretical data fulfills the so called geodesic KMS condition in the sense of H. J. Borchers and D. Buchholz, i.e. for any geodesic observer the system looks like a system within a thermal equilibrium state.

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