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ISSN - 10941622, Physical Review A - Atomic, Molecular, and Optical Physics, 2005, vol. 73, p. -

Corrections to the energy levels of a spin-zero particle bound in a strong field

Lee R. N., Milstein A. I., Karshenboim S. G.

Formulas for the corrections to the energy levels and wave functions of a spin-zero particle bound in a strong field are derived. The general case of the sum of a Lorentz-scalar potential and zero component of a Lorentz-vector potential is considered. The forms of the corrections differ essentially from those for spin- 1 2 particles. As an example of application of our results, we evaluated the electric polarizability of a ground state of a spin-zero particle bound in a strong Coulomb field. © 2006 The American Physical Society.