Pressure of massless hot scalar theory in the boundary effective theory framework

Abstract

We use the boundary effective theory (BET) approach to thermal field theory in order to calculate the pressure of a system of massless scalar fields with quartic interaction. The method naturally separates the infrared physics, and is essentially non-perturbative. To lowest order, the main ingredient is the solution of the free Euler-Lagrange equation with non-trivial (time) boundary conditions. We derive a resummed pressure, which is in good agreement with recent calculations found in the literature, following a very direct and compact procedure.

10 pages, 4 figures

References in corpus (4)

• Four-loop screened perturbation theory
• Applicability of the Linear delta Expansion for the lambda phi^4 Field Theory at Finite Temperature in the Symmetric and Broken Phases
• Pressure to order $g^8\ast log(g)$ in ${\varphi }^4$-theory at weak coupling
• Calculation of the pressure of a hot scalar theory within the Non-Perturbative Renormalization Group

Cited by in corpus (1)

• Effective potential in the BET formalism