Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Shigetoshi Katsura"'
Autor:
Shigetoshi Katsura, Mitsuhiro Seino
Publikováno v:
Progress of Theoretical Physics Supplement. 115:237-242
The integral equation for the distribution function g(h) of the effective field h is investigated. The Fourier transform S(x) of g(h) satisfies S(x) = (1/2π)∫ − ∞∞K(x, y) [S(y)] z−1 dy. The kernel K(x, y) which has been given by a double i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaee91c92fb4adee09947d506915ae73
https://doi.org/10.1143/ptps.115.237
https://doi.org/10.1143/ptps.115.237
Spin glasses for the long ranged and short ranged bond ising models without using the replica method
Autor:
Shigetoshi Katsura
Publikováno v:
Modern Trends in the Theory of Condensed Matter ISBN: 9783540097525
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1df5efe7ed82bfb699018007901b1353
https://doi.org/10.1007/bfb0120138
https://doi.org/10.1007/bfb0120138
Autor:
Mitsuhiro Seino, Shigetoshi Katsura
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 168:781-788
The free energy of the ± J Ising model at T =0 on the Bethe Lattice of the coordination number z =3 with the continuous distribution of the effective field was calculated to be F =-0.127492. It is close but a little higher than that of the discrete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77f24f7eca716cf2a49b0994c97c0ba1
https://doi.org/10.1016/0378-4371(90)90030-v
https://doi.org/10.1016/0378-4371(90)90030-v
Autor:
Shigetoshi Katsura
Publikováno v:
Theory and Applications of the Cluster Variation and Path Probability Methods ISBN: 9781461380436
The effective field method for the Ising model is closely related to the cluster variation method. In the first part we consider an effective field theory of the simple cubic lattice. Density matrices of a vertex, ρ (1), a pair, ρ (2), a square, ρ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c91fe4a9f928b1989e2ff58100ed7254
https://doi.org/10.1007/978-1-4613-0419-7_9
https://doi.org/10.1007/978-1-4613-0419-7_9
Autor:
Mitsuhiro Seino, Shigetoshi Katsura
Publikováno v:
Journal of Magnetism and Magnetic Materials. :1661-1662
The free energy of the ±J model at the finite temperatures on the Bethe lattice was obtained to be βF = (1 − 1 2z ) ∫ −x x ( 1 2 x) cosech (πx/2β)[S(x)] z d x+ 1 2 z∫ −x x [ cos (J 0 x)/2x] cosech (πx/2β) {S(x)] z−1 dx , where S(x)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c3601201e97cc66c3d31460369033a9
https://doi.org/10.1016/0304-8853(92)91500-s
https://doi.org/10.1016/0304-8853(92)91500-s
Autor:
Shigetoshi Katsura, Fumitaka Matsubara
Publikováno v:
Canadian Journal of Physics. 52:120-130
A method of obtaining the magnetic properties of the random mixture of plural kinds of magnetic atoms (including nonmagnetic atoms) in both the site and the bond problems is presented. The specific heats and the susceptibilities of the one-dimensiona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::395f389ce576c1642b097b094fd0caba
https://doi.org/10.1139/p74-019
https://doi.org/10.1139/p74-019
Autor:
Shigetoshi Katsura
Publikováno v:
Canadian Journal of Physics. 53:854-860
The specific heat, the susceptibility, and the correlation function at zero field above the critical temperature of the random mixture (quenched site and bond problems) of the classical Heisenberg spins with nearest neighbor interaction were obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3963b3b992aa1c76e954fd1cb6ed67d
https://doi.org/10.1139/p75-106
https://doi.org/10.1139/p75-106
Publikováno v:
Journal of Statistical Physics. 42:381-404
The energies and the spin configurations of the ground states of the classical Heisenberg and classical planar (XY) models with first- and second-neighbor interactions on the triangular and plane hexagonal lattices are obtained. The phase diagrams in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cddf8f397b618a724b3e676ddb94d3f
https://doi.org/10.1007/bf01127717
https://doi.org/10.1007/bf01127717
Publikováno v:
Journal of the Physical Society of Japan. 52:1531-1540
Monte Carlo simulations of the Ising model on the triangular lattice with the antiferromagnetic nn interaction J and the ferromagnetic nnn interaction J ' are carried out. Several physical quantities (magnetizations, energies, susceptibilities, speci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::943a4c233b5c768a84b3a94466dee2d7
https://doi.org/10.1143/jpsj.52.1531
https://doi.org/10.1143/jpsj.52.1531
Autor:
Shigetoshi Katsura
Publikováno v:
Progress of Theoretical Physics. 58:434-451
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd820eeb63df03fa1d6ea5256a44670a
https://doi.org/10.1143/ptp.58.434
https://doi.org/10.1143/ptp.58.434