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On the canonical transformation in the theory of exciton–phonon interaction
Author(s) -
Davydov A. S.,
Pestryakov G. M.
Publication year - 1972
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.2220490212
Subject(s) - exciton , phonon , transformation (genetics) , physics , biexciton , spectrum (functional analysis) , canonical transformation , condensed matter physics , quantum mechanics , chemistry , quantum , biochemistry , gene
A canonical transformation which eliminates the trilinear exciton–phonon interaction and introduces new elementary excitations — “dressed” excitons — is proposed; it holds true both for the narrow and for broad exciton bands. The energy spectrum of the dressed excitons is investigated in detail for a one‐dimensional model of Frenkel excitons interacting with optical phonons.