THE STATIC ATOM

Control of Intense Laser- Atom Processes With Strong Static Fields

We analyze the use of strong static electric and magnetic fields for controlling two intense laser-atom processes: laser-assisted x-ray-atom scattering and highorder harmonic generation. We find that x-rays scattered from atoms in the presence of both a strong laser field and a strong static electric field can be boosted in energy many-fold by absorption of energy from the laser field. The spec...

Static and dynamic dipole polarizability of the helium atom using wave functions involving logarithmic terms

Classification of perturbations of the hydrogen atom by small static electric and magnetic fields

We consider perturbations of the hydrogen atom by sufficiently small homogeneous static electric and magnetic fields of all possible mutual orientations. Normalising with regard to the Keplerian symmetry, we uncover resonances and conjecture that the parameter space of this family of dynamical systems is stratified into zones centred on the resonances. The 1:1 resonance corresponds to the ortho...

Many-body calculations of the static atom-wall interaction potential for alkali-metal atoms

We present third-order many-body perturbation theory calculations of the Lennard-Jones C3 coefficient for the alkali-metal atoms lithium, sodium, potassium, rubidium, cesium, and francium. All-order singles-doubles calculations of C3 are also presented for lithium, sodium, and potassium. For lithium and sodium the present values of C3 are compared with other theoretical and semiempirical values...

On Second Atom-Bond Connectivity Index

The atom-bond connectivity index of graph is a topological index proposed by Estrada et al. as ABC (G)  uvE (G ) (du dv  2) / dudv , where the summation goes over all edges of G, du and dv are the degrees of the terminal vertices u and v of edge uv. In the present paper, some upper bounds for the second type of atom-bond connectivity index are computed.