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7 papers · 2 filters
"Dressing" lines and vertices in calculations of matrix elements with the coupled-cluster method and determination of Cs atomic properties
Andrei Derevianko, Sergey Porsev
We consider evaluation of matrix elements with the coupled-cluster method. Such calculations formally involve infinite number of terms and we devise a method of partial summation (…
Two-step method for precise calculation of core properties in molecules
A. V. Titov, N. S. Mosyagin, A. N. Petrov +1
Precise calculations of core properties in heavy-atom systems which are described by the operators heavily concentrated in atomic cores, like to hyperfine structure and P,T-parity…
Configuration interaction calculation of hyperfine and P,T-odd constants on ^{207}PbO excited states for the electron EDM experiments
A. N. Petrov, A. V. Titov, T. A. Isaev +2
We report first configuration interaction calculations of hyperfine constants A_\parallel and the effective electric field W_d acting on the electric dipole moment of the electron,…
Atomic physics: computer calculations and theoretical analysis
E. G. Drukarev
It is demonstrated, how the theoretical analysis preceding the numerical calculations helps to calculate the energy of the ground state of helium atom, and enables to avoid qualita…
Three-Loop Reducible Radiative Photon Contributions to Lamb Shift and Hyperfine Splitting
Michael I. Eides, Valery A. Shelyuto
Corrections of order to the Lamb shift and corrections of order to hyperfine splitting generated by the insertions of the three-loop one-particle reducibl…
QED Calculation of E1M1 and E1E2 Transition Probabilities in One-Electron Ions with Arbitrary Nuclear Charge
L. N. Labzowsky, A. V. Shonin, D. A. Solovyev
The quantum electrodynamical theory of the two-photon transitions in hydrogenlike ions is presented. The emission probability for 2s1/2 -> 2E1+1s1/2 transitions is calculated and c…