On the dynamics of continuous phase transitions

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Abstract

The problem of the dynamics of the phase transition in an interacting Bose system is investigated from a microscopic point of view. By a general analysis of the structure of the perturbation expansion the existence of certain poles in the self-energies and the polarization part is revealed, which offers a mechanism to separate the one-particle and collective spectra (coinciding all over the Bose condensation range) from each other at the phase transition point. As an illustration to the general method mentioned above the model of the weakly interacting Bose gas is worked out in detail. The model possesses two excitation branches: One of them, the critical mode, exhibits universality and scaling behavior, if the system is close enough to the transition point.

Original languageEnglish
Pages (from-to)1-53
Number of pages53
JournalAnnals of Physics
Volume82
Issue number1
DOIs
Publication statusPublished - 1974

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transition points
poles
condensation
scaling
perturbation
expansion
polarization
gases
excitation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

On the dynamics of continuous phase transitions. / Szépfalusy, P.; Kondor, I.

In: Annals of Physics, Vol. 82, No. 1, 1974, p. 1-53.

Research output: Contribution to journalArticle

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