Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Bugrij, A. I."'
Autor:
Bugrij, A. I., Loktev, V. M.
The ideal Bose-gas with finite number $N$ of particles is investigated. The exact expressions for the partition functions and occupation numbers in the grand canonical, canonical and microcanonical ensembles are found. The asymp\-totic expressions (i
Externí odkaz:
http://arxiv.org/abs/2011.04625
Autor:
Bugrij, A. I., Loktev, V. M.
Publikováno v:
Low Temp. Phys. vol. 39, No 12 (2013)
The Bose-Einstein condensation (BEC) of magnons created by a strong pumping in ferromagnetic thin films of yttrium iron garnet used as systems of finite size is considered analytically. Such a peculiarity, typical for this magnetic material, as the p
Externí odkaz:
http://arxiv.org/abs/1401.4854
Autor:
Bugrij, A. I., Loktev, V. M.
Publikováno v:
Low Temp. Phys., vol. 35, October (2009)
An asymptotic expansions for the grand partition function of ideal Bose gas in the canonical ensemble with arbitrary number of particles is obtained. It is shown that the expressions found are valid in the whole temperature region, the critical tempe
Externí odkaz:
http://arxiv.org/abs/0912.4574
Autor:
Bugrij, A. I., Loktev, V. M.
An attempt is made to consider the difference between the proccesses of the Bose-Einstein condensation of particles and quasiparticles. An equation for particle number of the Bose-condensate as a function of the total number of particles in the syste
Externí odkaz:
http://arxiv.org/abs/0901.2553
Autor:
Bugrij, A. I., Lisovyy, O.
Publikováno v:
Theor. Math. Phys. 140 (2004) 987-1000; Teor. Mat. Fiz. 140 (2004) 113-127
We calculate the two-point correlation function and magnetic susceptibility in the anisotropic 2D Ising model on a lattice with one infinite and the other finite dimension, along which periodic boundary conditions are imposed. Using exact expressions
Externí odkaz:
http://arxiv.org/abs/0708.3643
Autor:
Bugrij, A. I., Lisovyy, O.
Publikováno v:
Phys. Lett. A319 (2003) 390-394
We present explicit formulas for all spin matrix elements in the 2D Ising model with the nearest neighbor interaction on the finite periodic square lattice. These expressions generalize the known results [Phys. Rev. D19, (1979), 2477--2479; hep-th/01
Externí odkaz:
http://arxiv.org/abs/0708.3625
Autor:
Bugrij, A. I., Loktev, V. M.
Publikováno v:
Low Temp. Phys. v.33, No 1 (January) (2007)
Bose condensation of quasiparticles in physical systems of finite size iz considered for the case of ferromagnetic thin films. It is shown that in accordance with present-day experimental capabilities which permit one to achieve densities of long-wav
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701437
Autor:
Bugrij, A. I.
The correlation function of the two dimensional Ising model with the nearest neighbours interaction on the finite size lattice with the periodical boundary conditions is derived. The expressions similar to the form factor expansion are obtained both
Externí odkaz:
http://arxiv.org/abs/hep-th/0107117
Autor:
Bugrij, A. I., Lisovyy, O.
Publikováno v:
J.Exp.Theor.Phys.94:1140-1148,2002; Zh.Eksp.Teor.Fiz.121:1328-1338,2002
Form factor representation of the correlation function of the 2D Ising model on a cylinder is generalized to the case of arbitrary disposition of correlating spins. The magnetic susceptibility on a lattice, one of whose dimensions ($N$) is finite, is
Externí odkaz:
http://arxiv.org/abs/hep-th/0106270
Autor:
Bugrij, A. I.
The correlation function of two dimensional Ising model with the nearest neighbours interaction on the finite size lattice with the periodical boundary conditions is derived. The expressions similar to the form factor representation are obtained both
Externí odkaz:
http://arxiv.org/abs/hep-th/0011104