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All Stories

  1. The Van Vleck Transformation: Further properties. Operators as vectors. Numerical algorithms

    Article • International Journal of Quantum Chemistry, October 2018, Wiley

    Dr Flemming Jørgensen

  2. Separation of Dirac's Hamiltonian by Van Vleck transformation

    Article • Molecular Physics, October 2016, Taylor & Francis

    Dr Flemming Jørgensen

  3. The Van Vleck Transformation: Principle vectors and geometric visualization

    Article • International Journal of Quantum Chemistry, September 2015, Wiley

    Dr Flemming Jørgensen

  4. Anharmonic corrections for linear triatomic molecules subject to the Renner-Teller effect

    Article • Molecular Physics, December 1982, Taylor & Francis

    Dr Flemming Jørgensen

  5. Angular momentum for a free rotator in terms of the Euler angles and their conjugate momenta

    Article • American Journal of Physics, August 1981, American Association of Physics Teachers (AAPT)

    Dr Flemming Jørgensen

  6. Perturbation theory without the usual sum over intermediate states

    Article • American Journal of Physics, February 1979, American Association of Physics Teachers (AAPT)

    Dr Flemming Jørgensen

  7. About Eckart's choice of orthonormal axes that rotates with a vibrating molecule

    Article • International Journal of Quantum Chemistry, July 1978, Wiley

    Dr Flemming Jørgensen

  8. About Klein's theorem of uniqueness and the canonical Van Vleck Transformation.

    Article • The Journal of Chemical Physics, April 1978, American Institute of Physics

    Dr Flemming Jørgensen

  9. Orthonormalization, polar decomposition and transformation to an effective hamiltonian.

    Article • International Journal of Quantum Chemistry, August 1977, Wiley

    Dr Flemming Jørgensen

  10. The projector formulated Van Vleck Transformation. Part III: The contact transformation

    Article • Molecular Physics, November 1975, Taylor & Francis

    Dr Flemming Jørgensen

  11. Transforming a perturbed Hamiltonian H=H0+V to an effective Heff. Theory and Expansions

    Article • Molecular Physics, April 1975, Taylor & Francis

    Dr Flemming Jørgensen

  12. A projector formulation of the Van Vleck transformation. Part II. Near- Degenerate case.

    Article • Molecular Physics, April 1974, Taylor & Francis

    Dr Flemming Jørgensen

  13. A projector formulation of the Van Vleck transformation. Part I. Degenerate case

    Article • Molecular Physics, January 1974, Taylor & Francis

    Dr Flemming Jørgensen

  14. Resurrection of the original approach to the Renner-Teller effect for a linear tri-atomic molecule

    Article • Wiley

    Dr Flemming Jørgensen