Anomalous states of positronium
arXiv:2004.06108 · doi:10.1103/PhysRevA.100.062128
Abstract
The energies and wave functions of the two-body Dirac equation for positronium are compared with those of the Pauli approximation and the Bethe-Salpeter equation. The unusual behavior of the ground-state wave function of the Dirac equation is explained in terms of anomalous bound-state solutions.
42 pages, 5 figures