Phys. Rev. A 53, 168–177 (1996)Minimax variational approach to the relativistic two-electron problemReceived 20 July 1995; published in the issue dated January 1996 A minimax formulation for the time-independent Dirac equation is extended to the two-particle problem. The question of solutions of the minimax formulation is discussed and related to the continuum dissolution problem. The approach is applied to the ground state and the n=2 complex of states of He-like ions. Variational calculations are made for bases with a small number of basis functions, varying the nonlinear parameters, as well as for large-dimensional configuration-interaction-type bases. © 1996 The American Physical Society. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.53.168
DOI:
10.1103/PhysRevA.53.168
PACS:
03.65.Fd, 03.65.Ge, 31.15.-p, 31.25.-v
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