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Bose commutation rule approximation in the theory of spin systems and elementary excitation spectrum
Author(s) -
Derzhko O. V.,
Ph. Moina A.
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221960123
Subject(s) - commutation , excitation , spectrum (functional analysis) , spin (aerodynamics) , physics , momentum (technical analysis) , sum rule in quantum mechanics , quantum mechanics , energy spectrum , quantum electrodynamics , mathematical physics , finance , voltage , economics , thermodynamics , quantum chromodynamics
The Bose commutation rule approximation for spin operators has been examined using as a testing ground the 1D s = 1/2 generalized XY model. The conditions under which the dependence of the elementary excitation energy on quasi‐momentum is not changed after such an approximationhave been found.