Geometry and symmetries of multi-particle systems

Details Geometry and symmetries of multi-particle systems Geometry and symmetries of multi-particle systems

1999-05-27

arxiv.org/abs/physics/9905052v1

J. Phys. B vol. 32 (28 March 1999) R1-R37

Physics

Atomic and Molecular Clusters

37 pages, 2 eps figures

Scientific paper

10.1088/0953-4075/32/6/004

The quantum dynamical evolution of atomic and molecular aggregates, from their compact to their fragmented states, is parametrized by a single collective radial parameter. Treating all the remaining particle coordinates in d dimensions democratically, as a set of angles orthogonal to this collective radius or by equivalent variables, bypasses all independent-particle approximations. The invariance of the total kinetic energy under arbitrary d-dimensional transformations which preserve the radial parameter gives rise to novel quantum numbers and ladder operators interconnecting its eigenstates at each value of the radial parameter. We develop the systematics and technology of this approach, introducing the relevant mathematics tutorially, by analogy to the familiar theory of angular momentum in three dimensions. The angular basis functions so obtained are treated in a manifestly coordinate-free manner, thus serving as a flexible generalized basis for carrying out detailed studies of wavefunction evolution in multi-particle systems.

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