Dual kinetic balance approach to basis-set expansions for the dirac equation.
A new approach to finite basis sets for the Dirac equation is developed. It does not involve spurious states and improves the convergence properties of basis-set calculations. Efficiency of the method is demonstrated for finite basis sets constructed from B splines by calculating the one-loop self-energy correction for a hydrogenlike ion.
Shabaev
V M
VM
Department of Physics, St. Petersburg State University, Oulianovskaya 1, Petrodvorets, St. Petersburg 198504, Russia.
Tupitsyn
I I
II
Yerokhin
V A
VA
Plunien
G
G
Soff
G
G