Renormalized linear kinetic theory as derived from quantum field theory: A novel diagrammatic method for computing transport coefficients
- Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
We propose a novel diagrammatic method for computing transport coefficients in relativistic quantum field theory. The self-consistent equation for summing the diagrams with pinch singularities has the form of a linearized kinetic equation as usual, but our formalism enables us to incorporate higher-order corrections of the coupling systematically for the first time. Furthermore, it is clarified that the higher-order corrections are nicely summarized into that of the vertex function, spectral function, and collision term. We identify the diagrams up to the next-to-next-leading-order corrections in the weak coupling expansion of {phi}{sup 4} theory, which is a difficult task in kinetic approaches and other diagrammatic methods.
- OSTI ID:
- 21537759
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 83, Issue 7; Other Information: DOI: 10.1103/PhysRevD.83.076004; (c) 2011 American Institute of Physics; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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