Finite-Temperature Bose-Einstein Condensation in Interacting Boson System


  • D. Anchishkin Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine, Taras Shevchenko National University of Kyiv, Frankfurt Institute for Advanced Studies
  • I. Mishustin Frankfurt Institute for Advanced Studies, National Research Center “Kurchatov Institute”
  • O. Stashko Taras Shevchenko National University of Kyiv
  • D. Zhuravel Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
  • H. Stoecker Frankfurt Institute for Advanced Studies, Goethe University Frankfurt



pion gas, phase transition, condensate


Thermodynamical properties of an interacting boson system at finite temperatures and zero chemical potential are studied within the framework of the Skyrme-like mean-field toy model. It is assumed that the mean field contains both attractive and repulsive terms. Self-consistency relations between the mean field and thermodynamic functions are derived. It is shown that, for sufficiently strong attractive interactions, this system develops a first-order phase transition via the formation of a Bose condensate. An interesting prediction of the model is that the condensed phase is characterized by a constant total density of particles. It is shown that the energy density exhibits a jump at the critical temperature.


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How to Cite

Anchishkin, D., Mishustin, I., Stashko, O., Zhuravel, D., & Stoecker, H. (2019). Finite-Temperature Bose-Einstein Condensation in Interacting Boson System. Ukrainian Journal of Physics, 64(12), 1118.



Fields and elementary particles

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