Soliton-breather approach to classical sine-Gordon thermodynamics

Kazuo Sasaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Thermodynamics of the Boltzmann gas consisting of solitons, antisolitons, and breathers of the classical sine-Gordon system is studied by taking their interactions into account. A compact expression for the thermodynamic potential is obtained, which agrees with that obtained from the classical limit of the Bethe-ansatz formulation of the quantum sine-Gordon thermodynamics. We further find that the average number of breathers excited at low temperatures (mTM, where m and M are the phonon and the soliton masses, respectively) is half the total number of degrees of freedom of the system.

Original languageEnglish
Pages (from-to)2214-2220
Number of pages7
JournalPhysical Review B
Issue number4
Publication statusPublished - 1986 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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