Thermal operator representation of finite temperature graphs
Journal Article
·
· Physical Review. D, Particles Fields
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627-0171 (United States)
- Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile)
- Departamento de Fisica, Universidade Federal do Para, Belem, Para 66075-110 (Brazil)
Using the mixed space representation (t,p{yields}) in the context of scalar field theories, we prove in a simple manner that the Feynman graphs at finite temperature are related to the corresponding zero temperature diagrams through a simple thermal operator, both in the imaginary time as well as in the real time formalisms. This result is generalized to the case when there is a nontrivial chemical potential present. Several interesting properties of the thermal operator are also discussed.
- OSTI ID:
- 20713760
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 8; Other Information: DOI: 10.1103/PhysRevD.72.085006; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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