Towards Euclidean Theory of Infrared Singular Quantum Fields

Details Towards Euclidean Theory of Infrared Singular Quantum Fields Towards Euclidean Theory of Infrared Singular Quantum Fields

2002-05-18

arxiv.org/abs/math-ph/0205024v2

J.Math.Phys. 44 (2003) 2058-2076

Physics

Mathematical Physics

24 pages, AmS-LaTeX, section about Wick power series added, submitted to J. Math. Phys

Scientific paper

A new generalized formulation of the spectral condition is proposed for quantum fields with highly singular infrared behavior whose vacuum correlation functions are well defined only under smearing with analytic test functions in momentum space. The Euclidean formulation of QFT developed by Osterwalder and Schrader is extended to theories with infrared singular indefinite metric. The corresponding generalization of the reconstruction theorem is obtained. The fulfilment of the generalized spectral condition is verified for quantum fields representable by infinite series in the Wick powers of indefinite metric free fields.

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