We examine the question of reduced Hamiltonians for the torsion-rotation problem and in particular the question of the continuity of frequencies obtained by projecting out a large-amplitude torsional coordinate. We find that suitable results for torsion-rotation analysis can be obtained using either a rectilinear or a curvilinear formalism.
Bibliographical noteFunding Information:
The authors are grateful to Jon Hougen and Li-Hong Xu for helpful comments on the manuscript. This work was supported in part by the US Department of Energy, Office of Basic Energy Sciences.
- Frequency analysis with a projected Hessian
- Reaction coordinate