We study far- and near-field magnetic and electric multipole moments induced in the ground state of the Dirac one-electron atom placed in a weak 2L-pole magnetostatic field. The analysis is carried out within the framework of the first-order Rayleigh-Schrödinger perturbation theory, with the use of the Sturmian expansion of the generalized Dirac-Coulomb Green function [Szmytkowski, J. Phys. B 30, 825 (1997);J. Phys. B 30, 2747(E) (1997)]. Closed-form analytical expressions for multipole magnetizabilities χL, magnetic nuclear shielding constants σML→ML, the far-field magnetic-to-electric cross-susceptibilities χML→E(L∓1), and the near-field counterparts σML→E(L∓1) of the latter are derived. The formulas obtained for χL and σML→ML are much simpler than those available in the literature. We establish the relationship χML→E(L∓1)=αE(L∓1)→ML, where αE(L∓1)→ML are the multipole far-field electric-to-magnetic susceptibilities discussed in our previous paper [Szmytkowski and Łukasik, Phys. Rev. A 93, 062502 (2016)]. It is also found that when the atom is placed in superimposed weak and static electric and magnetic fields of respective multipolarities 2L1 and 2L2, such that L1=L2∓1, then the second-order correction to the ground-state energy contains an additional term entangling both fields and involving the cross-susceptibility αEL1→ML2=χML2→EL1.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1103/physreva.98.022502
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2018
