0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Current issue Ukr. J. Phys. 2014, Vol. 58, N 5, p.497-504
Yushchenko O.V., Badalyan A.Yu.
Sumy State University
(2, Ryms’kyi-Korsakov Str., Sumy 40007, Ukraine; e-mail: email@example.com)
Microscopic Description of Nonextensive Systems in the Framework of the Ising Model
Section: General problems of theoretical physics
Original Author's Text: Ukrainian
Abstract: To describe the behavior of nonextensive systems, the deformed Ising Hamiltonian is introduced by substituting the spin variable si by the deformed one sqi. In the framework of mean-field theory, the phase transition paramagnet–ferromagnet is investigated for the deformed partition function. The influence of the non-extensive parameter q on the free-energy density and the steady-state value of order parameter is studied in the Landau approximation.
Key words: Ising model, Hamiltonian, order parameter.