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Contribution to the Quantum Theory of the Seond‐Harmonic Generation in a Molecular Crystal
Author(s) -
Lebon F.
Publication year - 1970
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.19700410133
Subject(s) - diamagnetism , wave function , crystal (programming language) , second harmonic generation , ground state , quantum mechanics , quantum , perturbation (astronomy) , harmonic , molecule , perturbation theory (quantum mechanics) , function (biology) , tetramine , physics , mathematical analysis , mathematics , chemistry , computer science , laser , evolutionary biology , magnetic field , biology , programming language
The quantum theory of the second‐harmonic generation is developed for diamagnetic molecules through a variational perturbation method. The advantage of this method is that it requires only to know the wave function Ψ 0 (0)of the ground state of the non‐perturbed molecule; thus, the coefficient characterizing the second‐harmonic generation can be expressed as a function of the wave function Ψ 0 (0)and of vectors determined by a variation calculus; so this coefficient can be computed numerically. This calculation is achieved for the hexamethylene‐tetramine crystal.