Dirac theory of ring-shaped electron distributions in atoms
نویسندگان
چکیده
The time-dependent Dirac equation is solved numerically on a space-time grid for an atom in a strong static magnetic field and a laser field. The resonantly induced relativistic motion of the atomic electron leads to a ringlike spatial probability density similar to the features that have been recently predicted @Wagner, Su, and Grobe, Phys. Rev. Lett. 84, 3282 ~2000!# based on a phase-space method. We further demonstrate that spin-orbit coupling for a fast-moving electron in such an atom becomes significant and the time dependence of the spin can dephase even if initially aligned parallel to the direction of the static magnetic field.
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