Year: 2009
Type: article
Abstract: We formulate a classical fields method for the description of relativistic interacting bosonic particles at nonzero temperatures. The method relies on the assumption that at low temperatures the Bose field can be described by a $c$-number function. We discuss a very important role of the cutoff momentum which divides the field into a dominant classical part and a small quantum correction. We illustrate the method by studying the thermodynamics of a relativistic Bose field which is governed by the Klein-Gordon equation with a $\ensuremath{\lambda}{\ensuremath{\psi}}^{4}$ term responsible for the interactions.
Authors: Emilia Witkowska, Paweł Ziń, Mariusz Gajda
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1980595336