Mathematical Structure of Relativistic Coulomb Integrals

Details Mathematical Structure of Relativistic Coulomb Integrals Mathematical Structure of Relativistic Coulomb Integrals

2009-10-31

arxiv.org/abs/0911.0111v5

Physics

Mathematical Physics

13 pages, no figures

Scientific paper

We show that the diagonal matrix elements $< Or^{p} >,$ where $O$ $={1,\beta,i\mathbf{\alpha n}\beta}$ are the standard Dirac matrix operators and the angular brackets denote the quantum-mechanical average for the relativistic Coulomb problem, may be considered as difference analogs of the radial wave functions. Such structure provides an independent way of obtaining closed forms of these matrix elements by elementary methods of the theory of difference equations without explicit evaluation of the integrals. Three-term recurrence relations for each of these expectation values are derived as a by-product. Transformation formulas for the corresponding generalized hypergeometric series are discussed.

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