Zobrazeno 1 - 10 of 23 pro vyhledávání: '"J N Kotzev"'
3
Symmetries in magnetic phase transitions: I. The Landau-Ginzburg-Wilson Hamiltonian
Autor: M. I. Aroyo, Momtchil Peev, R. Dirl, J. N. Kotzev, P. Kasperkovitz
Publikováno v: Journal of Physics A: Mathematical and General. 23:4399-4413
The Landau-Ginzburg-Wilson Hamiltonian is a function that relates Landau's phenomenological theory of magnetic phase transitions to the quantum mechanics of a microscopic spin model. The authors study how the symmetry of the system under consideratio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::795367753b1421e81dee9a2885e60c00
https://doi.org/10.1088/0305-4470/23/19/022
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4
Colour space groups of all cubic chromomorphic classes and their application
Autor: J. N. Kotzev, D. A. Alexandrova
Publikováno v: Group Theoretical Methods in Physics ISBN: 3540502459
The method and the derivation of the full tables of 2801 permutational colour groups,isomorphic to the crystallographic space groups,with the colour permutation groups,isomorphic to the cubic point groups, are given.The application of these groups an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5854397504f924a13d5fb729ad89ffd1
https://doi.org/10.1007/bfb0012299
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5
Auxiliary group approach for group-subgroup related transformation matrices
Autor: Momtchil Peev, R. Dirl, P. Kasperkovitz, M. I. Aroyo, J. N. Kotzev
Publikováno v: Group Theoretical Methods in Physics ISBN: 3540502459
The auxiliary group approach is extended to a systematic calculation of subducing matrices and to relate various isoscalar matrices.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::652925c3b47d8474f1fe33cff288f5ef
https://doi.org/10.1007/bfb0012300
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6
Generating relations for reducing matrices. I. Ordinary representations
Autor: M. I. Aroyo, R. Dirl, J. N. Kotzev, P. Kasperkovitz, M. N. Angelova‐Tjurkedjieva
Publikováno v: Journal of Mathematical Physics. 27:37-52
Auxiliary groups are constructed that make it possible to reduce the multiplicity problem and to derive consistent generating relations for the elements of reducing matrices. Three examples are worked out to illustrate the general scheme.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::843b9421bd0a0c95fd9ff4af7a4385e4
https://doi.org/10.1063/1.527344
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9
Generating relations for reducing matrices. II. Corepresentations
Autor: M. N. Angelova‐Tjurkedjieva, M. I. Aroyo, R. Dirl, J. N. Kotzev, P. Kasperkovitz
Publikováno v: Journal of Mathematical Physics. 27:2236-2246
The auxiliary group approach developed in Paper 1 [R. Dirl, P. Kasperkovitz, M. I. Aroyo, J. N. Kotzev, and M. Angelova‐Tjurkedjieva, J. Math. Phys. 27, 37 (1986)] is generalized for the case of corepresentations of antiunitary groups. It allows us
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ef37aa152841dc758fe0d1bf29b2b95
https://doi.org/10.1063/1.526995
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10
Additional symmetry of Clebsch-Gordan coefficients for corepresentations
Autor: M I Aroyo, J N Kotzev
Publikováno v: Journal of Physics A: Mathematical and General. 17:727-735
The concept of associated representations is generalised for the case of corepresentations. Symmetry relations for the Clebsch-Gordan coefficients based on the association of corepresentations are derived. This additional symmetry not only reduces th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf4634eedbf23552cb59387b17faa6f7
https://doi.org/10.1088/0305-4470/17/4/014
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