1998/09/14 by Maria Asprouli, Asprouli, Maria, Victor Galan-Gonzalez +1
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Quantum Mechanics and Applications #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/9809099
4 pages, 1 figure, REVTeX, to appear in Proceedings of the 5th International Workshop on Thermal Field Theories and Their Applications, Regensburg, Germany, August 10-14, 1998
arxiv created 1998/09/14 · openalex publication_date 1998/09/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We compute the quadratic part of the thermal effective action for real scalar fields which are initially in thermal equilibrium and vary slowly in time using a generalised real-time formalism proposed by Le Bellac and Mabilat \citebelmab. We derive both Real Time and Imaginary Time Formalisms and find that the result is analytic at the limits of zero external four-momenta when using our full time contour. We expand the fields in time up to the second derivative and discuss the initial time dependence of our result before and after the expansion in terms of equilibrium.