Coupled Q oscillators as a model for vibrations of polyatomic molecules

Jan, 1997
13 pages
Published in:
  • J.Chem.Phys. 106 (1997) 605
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Abstract:
The system of two QQ-deformed oscillators coupled so that the total Hamiltonian has the suQ_Q(2) symmetry is proved to be equivalent, to lowest order approximation, to a system of two identical Morse oscillators coupled by the cross-anharmonicity usually used empirically in describing vibrational spectra of triatomic molecules. The symmetry also imposes a connection between the self-anharmonicity of the Morse oscillators and the cross-anharmonicity strength, which can be removed by replacing the QQ-oscillators by deformed anharmonic oscillators. The generalization to nn oscillators is straightforward. The applicability of the formalism to highly symmetric polyatomic molecules is discussed.
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  • 13 pages, LaTeX