The bound eigenfunctions and spectrum of a Dirac hydrogen atom are found takmg advantage of the SU(1, 1) Lie algebra in which the radial part of the problem can be expressed. For defining the algebra we need to add to the ...

A novel realization of the classical SU(2) algebra is introduced for the Dirac relativistic hydrogen atom defining a set of operators that allow the factorization of the problem. An extra phase is needed as a new variable ...

General recurrence relations for arbitrary non-diagonal, radial hydrogenic matrix elements are derived in Dirac relativistic quantum mechanics, Our approach is based on a generalization of the second hypervirial method ...

Recently obtained recurrence formulae for relativistic hydrogenic radial matrix elements are cast in a simpler and perhaps more useful form. This is achieved with the help of a new relation between the r(a) and the betar(b) ...