The thermal operator representation for Matsubara sums

Details The thermal operator representation for Matsubara sums The thermal operator representation for Matsubara sums

2005-01-28

arxiv.org/abs/hep-ph/0501273v1

Phys.Rev.D71:065009,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure, RevTex

Scientific paper

10.1103/PhysRevD.71.065009

We prove in full generality the thermal operator representation for Matsubara sums in a relativistic field theory of scalar and fermionic particles. It states that the full result of performing the Matsubara sum associated to any given Feynman graph, in the imaginary-time formalism of finite-temperature field theory, can be directly obtained from its corresponding zero-temperature energy integral, by means of a simple linear operator, which is independent of the external Euclidean energies and whose form depends solely on the topology of the graph.

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