Zobrazeno 1 - 10
of 14
pro vyhledávání: '"V G Makhankov"'
Publikováno v:
Journal of Physics A: Mathematical and General. 29:3005-3019
Generalized Coherent States (GCS) are constructed (and discussed) in order to study quasiclassical behaviour of quantum spin models of the Heisenberg type. Several such models are taken to their semiclassical limits, whose form depends on the spin va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6716fcd17d0d1c629aa3ce6c3cafacaa
https://doi.org/10.1088/0305-4470/29/12/009
https://doi.org/10.1088/0305-4470/29/12/009
Autor:
V. G. Makhankov, M. A. Agüero Granados
Publikováno v:
Coherent States.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7492115d26c89b187d03a4857ee333a6
https://doi.org/10.1142/9789814503839_0002
https://doi.org/10.1142/9789814503839_0002
Publikováno v:
Nonlinear Evolution Equations and Dynamical Systems ISBN: 9783540532941
The equations are derived which describe dynamics of small amplitude spin waves in the S=l easy-axis Heisenberg model. To proceed from quantum to quasiclassical description the generalized coherent states (CS) corresponding to the space CP2 =SU (3) /
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1c95f740fff3fc5775454975c97d7d2
https://doi.org/10.1007/978-3-642-76172-0_40
https://doi.org/10.1007/978-3-642-76172-0_40
Autor:
V. G. Makhankov, J. Hronek
Publikováno v:
Nonlinear Evolution Equations and Dynamical Systems ISBN: 9783540532941
1. The purpose of the present paper is to describe the method of constructing localised solutions to some class of nonlinear models that have been succesfully applied in different areas of solid state physics [1]. Among them there are the sin-Gordon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90864367e96a4eef332f9cea17f96cc5
https://doi.org/10.1007/978-3-642-76172-0_5
https://doi.org/10.1007/978-3-642-76172-0_5
Autor:
V. G. Makhankov
Publikováno v:
Solitons and Chaos ISBN: 9783540543893
Various version of the so-called Heisenberg ferromagnet model $$ {\hat H_{ea}} = - J\sum\limits_j {\left( {{{\hat \vec S}_j}{{\hat \vec S}_{j + 1}} + \delta \hat S_j^z\hat S_{j + 1}^z} \right)} $$ (1) are well-known to be treated via certain techniqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50b8f5d726a666efc5d21bf7bc5349f7
https://doi.org/10.1007/978-3-642-84570-3_10
https://doi.org/10.1007/978-3-642-84570-3_10
Autor:
A V Makhankov, V G Makhankov
Publikováno v:
Journal of Physics: Condensed Matter. 2:6335-6336
Skrinjar and co-workers (see ibid., vol.1, p.725, 1989) used a Holstein-Primakoff operator method to obtain a classical Hamiltonian. It is shown that the same Hamiltonian can be derived directly via averaging over spin coherent states, so the former
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d1cca77a25b5d1e7c81ee202687f80e
https://doi.org/10.1088/0953-8984/2/29/013
https://doi.org/10.1088/0953-8984/2/29/013
Autor:
V. G. Makhankov, A. V. Makhankov
Publikováno v:
physica status solidi (b). 145:669-678
The XXZ Heisenberg spin chain is considered. Following results are obtained: for the Bosonization of the spin Hamiltonians widely used Holstein-Primakoff transformations are very sensitive to the way of breaking an initial system symmetry by the grou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af0e748ceaf88d942fa61f393ef7149a
https://doi.org/10.1002/pssb.2221450233
https://doi.org/10.1002/pssb.2221450233
Autor:
V G Makhankov
Publikováno v:
Physica Scripta. 20:558-562
The properties of one and more space dimensional solitons are discussed on the basis of the works performed mainly in Dubna at the Joint Institute for Nuclear Research, Laboratory of Computing Techniques and Automation. The conception of near integra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2095de770d1f2d59c229c155e109430
https://doi.org/10.1088/0031-8949/20/3-4/036
https://doi.org/10.1088/0031-8949/20/3-4/036
Autor:
V K Fedyanin, V G Makhankov
Publikováno v:
Physica Scripta. 20:552-557
The soliton-like solutions to a perturbative Schr?dinger equation with cubic nonlinearity which describes a broad class of condensed matter theory phenomena are obtained and investigated. The whole family of solutions is shown not to be obtained via
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d141ece8a40930dc8292a95a7b9780f2
https://doi.org/10.1088/0031-8949/20/3-4/035
https://doi.org/10.1088/0031-8949/20/3-4/035
Autor:
V G Makhankov, V K Fedyanin
Publikováno v:
Physica Scripta. 28:221-228
A phenomenological approach to the description of the equilibrium characteristics of kink gas is proposed, which is based on model of lattice gas. A general simple technique for obtaining the dynamical structure factors (DSF) of solitions and bions i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35f350186731cb40be3cd3880e75de2e
https://doi.org/10.1088/0031-8949/28/2/015
https://doi.org/10.1088/0031-8949/28/2/015