Short Distance Properties from Large Distance Behaviour

Details Short Distance Properties from Large Distance Behaviour Short Distance Properties from Large Distance Behaviour

1997-02-09

arxiv.org/abs/hep-th/9702072v1

Int.J.Mod.Phys. A13 (1998) 4101-4122

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, LaTeX, 8 figures

Scientific paper

10.1142/S0217751X9800192X

For slowly varying fields the vacuum functional of a quantum field theory may be expanded in terms of local functionals. This expansion satisfies its own form of the Schr\"odinger equation from which the expansion coefficents can be found. For scalar field theory in 1+1 dimensions we show that this approach correctly reproduces the short-distance properties as contained in the counter-terms. We also describe an approximate simplification that occurs for the Sine-Gordon and Sinh-Gordon vacuum functionals.

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