The Classical approximation for real time scalar field theory at finite temperature
Sep, 1998Citations per year
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Abstract:
The use of classical thermal field to approximate real-time quantum thermal field theory is discussed. For a \lambda\phi^4 theory, it is shown that the classical Rayleigh-Jeans divergence can be canceled with the appropriate counterterms, and a comparison is made between the classical and quantum perturbative expansion. It is explained why Hard Thermal Loops prevent the same method to work for gauge theories.- talk: Regensburg 1998/08/10
- phi**n model: 4
- finite temperature
- approximation: classical
- propagator
- perturbation theory
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