Thermal Operator Representation of Finite Temperature Graphs

Details Thermal Operator Representation of Finite Temperature Graphs Thermal Operator Representation of Finite Temperature Graphs

2005-08-09

arxiv.org/abs/hep-th/0508067v1

Phys.Rev.D72:085006,2005

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, seven figures

Scientific paper

10.1103/PhysRevD.72.085006

Using the mixed space representation (t,p) 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.

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