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Axiomatic Quantum Field Theory in Terms of Operator Product Expansions: General Framework, and Perturbation Theory via Hochschild Cohomology
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- Symmetry, Integrability and Geometry: Methods and Applications (SIGMA)
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- Symmetry, Integrability and Geometry: Methods and Applications, 2009, том 5
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Axiomatic Quantum Field Theory in Terms of Operator Product Expansions: General Framework, and Perturbation Theory via Hochschild Cohomology
Інший ID:
2000 Mathematics Subject Classification: 81T15; 81T70; 81Rxx; 16E40
Посилання:
Axiomatic Quantum Field Theory in Terms of Operator Product Expansions: General Framework, and Perturbation Theory via Hochschild Cohomology / S. Hollands // Symmetry, Integrability and Geometry: Methods and Applications. — 2009. — Т. 5. — Бібліогр.: 46 назв. — англ.
Підтримка:
This paper is a contribution to the Special Issue on Deformation Quantization. I am grateful to N. Nikolov for extensive discussions on various topics in this paper as well as to K.-H. Rehren and R.M. Wald for discussions. Special thanks go to C. Brouder for his careful reading of the manuscript, and in particular for pointing out several sign errors in the first version. I especially appreciate the comments by the referees of this paper (in particular Referee 3, whose comments led me to make more precise some aspects the setup laid out in Sections 3, 4, 5), and also those of the Editor M. Kontsevich. These comments have led to numerous improvements of the paper, and they are hereby gratefully acknowledged.
Дата:
2009
Переглядів:
500
Завантажень:
237
Анотація:
In this paper, we propose a new framework for quantum field theory in terms of consistency conditions. The consistency conditions that we consider are ''associativity'' or ''factorization'' conditions on the operator product expansion (OPE) of the theory, and are proposed to be the defining property of any quantum field theory. Our framework is presented in the Euclidean setting, and is applicable in principle to any quantum field theory, including non-conformal ones. In our framework, we obtain a characterization of perturbations of a given quantum field theory in terms of a certain cohomology ring of Hochschild-type. We illustrate our framework by the free field, but our constructions are general and apply also to interacting quantum field theories. For such theories, we propose a new scheme to construct the OPE which is based on the use of non-linear quantized field equations.
