• On the use of dipole moment as a collective coordinate in constrained variational calculations

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      https://www.ias.ac.in/article/fulltext/jcsc/099/01-02/0083-0089

    • Keywords

       

      Constrained variation; direct determination of density; penalty function method; dipole moment as a collective coordinate

    • Abstract

       

      The dipole moment function of a diatomic molecule may be viewed as a continuous collective coordinate which encodes a lot of information about sharing of electrons between the atoms concerned. By its very nature it takes cognizance of certain many-body effects and should shape the constrained wavefunction or the one electron density in much the same way as would explicit inclusion of the same many-body effects. A case study of the problem with lithium hydride as the model system has been presented and the long range behaviour of the constrained density analysed. The spectrum of the constrained Fock operator is compared with that of the unconstrained one.

    • Author Affiliations

       

      P Khan1 K K Das1 S P Bhattacharyya1

      1. Theory Group, Department of Physical Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta - 700 032, India
    • Dates

       
  • Journal of Chemical Sciences | News

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