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Brazilian Journal of Physics

Print version ISSN 0103-9733On-line version ISSN 1678-4448


BESSA, A.; CARVALHO, C.A.A. de; FRAGA, E.S.  and  GELIS, F.. Semiclassical approximation for the partition function in QFT. Braz. J. Phys. [online]. 2007, vol.37, n.1a, pp.30-32. ISSN 0103-9733.

In this paper we discuss the semiclassical approximation for the thermodynamics of scalar fields. We construct a semiclassical propagator in terms of two solutions of an ordinary differential equation. The main result is an analytic (non-perturbative) expression for the partition function written in terms of known quantities.

Keywords : Semiclassical approximation; Thermodynamics of scalar fields; Partition function.

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