Dynamic topological solitons in a two-dimensional ferromagnet

1999 ◽  
Vol 88 (4) ◽  
pp. 833-843 ◽  
Author(s):  
A. A. Zhmudskii ◽  
B. A. Ivanov
Keyword(s):  
Two Dimensional ◽  
Topological Solitons

scholarly journals Charges and Electromagnetic Radiation as Topological Excitations

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Manfried Faber
Keyword(s):  
Electromagnetic Radiation ◽  
Minkowski Space ◽  
Degrees Of Freedom ◽  
Photon Number ◽  
Two Dimensional ◽  
Topological Solitons ◽  
Topological Excitations ◽  
Quantum Numbers ◽  
Topological Quantum ◽  
Three Degrees Of Freedom

We discuss a model with stable topological solitons in Minkowski space with only three degrees of freedom, the rotational angles of a spatial Dreibein. This model has four types of solitons differing in two topological quantum numbers which we identify with electric charge and spin. The vacuum has a two-dimensional degeneracy leading to two types of massless excitations, characterised by a topological quantum number which could have a physical equivalent in the photon number.

Dynamical correlation from topological solitons in two-dimensional anisotropic models

1992 ◽  
Vol 89 (1) ◽  
pp. 109-114 ◽  
Author(s):  
A. R. Pereira ◽  
A. S. T. Pires ◽  
M. E. Gouv�a ◽  
B. V. Costa
Keyword(s):  
Two Dimensional ◽  
Dynamical Correlation ◽  
Topological Solitons ◽  
Anisotropic Models

scholarly journals Dynamics of topological solitons in two-dimensional ferromagnets

2006 ◽  
Vol 50 (3) ◽  
pp. 393-402 ◽  
Author(s):  
D. D. Sheka ◽  
C. Schuster ◽  
B. A. Ivanov ◽  
F. G. Mertens
Keyword(s):  
Two Dimensional ◽  
Topological Solitons

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

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