60 citations · 228 across the 13 of their papers we have counts for
13 papers
Simplified partial wave expansion of the Lamb shift
J. Sapirstein, K. T. Cheng
A method for calculating the self energy part of the Lamb shift is revisited. When the electron propagator in an external field is represented as an expansion in partial waves, the…
Green Function of the Poisson Equation: D=2,3,4
U. D. Jentschura, J. Sapirstein
We study the Green function of the Poisson equation in two, three and four dimensions. The solution g of the equation nabla^2 g(x - x') = delta^(D)(x - x'), where x and x are D-dim…
Stark shift and parity non-conservation for near-degenerate states of xenon
L. Bougas, G. E. Katsoprinakis, D. Sofikitis +8
We identify a pair of near-degenerate states of opposite parity in atomic Xe, the at cm and at $\rm{E…
Bound-state field theory approach to proton structure effects in muonic hydrogen
Peter J. Mohr, J. Griffith, J. Sapirstein
A bound-state field theory approach to muonic hydrogen is set up using a variant of the Furry representation in which the lowest-order Hamiltonian describes a muon in the presence…
Field-theory calculation of the electric dipole moment of the neutron and paramagnetic atoms
S. A. Blundell, J. Griffith, J. Sapirstein
Electric dipole moments (edms) of bound states that arise from the constituents having edms are studied with field-theoretic techniques. The systems treated are the neutron and a s…
Recoil corrections in the hydrogen isoelectronic sequence
G. S. Adkins, J. Sapirstein
A version of the Bethe-Salpeter equation appropriate for calculating recoil corrections in highly charged hydrogenlike ions is presented. The nucleus is treated as a scalar particl…