We discuss the deformation quantization approach to perturbative quantum field theory. The various forms of Wick's theorem are shown to be a direct consequence of the structure of the star products. The scattering function for a scalar field in interaction with a spacetime-dependent source is derive
✦ LIBER ✦
Perturbative symplectic field theory and Wigner function
✍ Scribed by Ronni G.G. Amorim; Faqir C. Khanna; Ademir E. Santana; José David M. Vianna
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 521 KB
- Volume
- 388
- Category
- Article
- ISSN
- 0378-4371
No coin nor oath required. For personal study only.
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## Abstract The quasi‐degenerate perturbation theory (QDPT) with complete active space (CAS) self‐consistent field (SCF) reference functions is extended to the general multiconfiguration (MC) SCF references functions case. A computational scheme that utilizes both diagrammatic and sum‐over‐states a