The exchange of orbital angular momentum between a Laguerre-Gaussian beam of light
and the center-of-mass motion of an atom or molecule is well known. We show that the …

We have carried out atomic structure calculations using systematically enlarged
multiconfiguration Dirac-Fock wavefunctions of Li-like ions of the most prominent plasma …

X-ray emission spectroscopy is a well-established technique used to study continuum
lowering in dense plasmas. It relies on accurate atomic physics models to robustly …

We present two analytical methods, Taylor expansion and Gegenbauer expansion, to
efficiently and accurately calculate the two-electron screened Coulomb potential matrix …

The exchange of orbital angular momentum (OAM) between paraxial optical vortex and a
Bose-Einstein condensate (BEC) of atomic gases is well known. In this paper, we develop a …

Positronium (Ps) formation processes in collisions between positrons and alkali atoms (Li,
Na, K, Rb and Cs) in Debye plasma environments have been investigated using the …

We investigate the doubly excited P-wave resonance states of H− system in Debye plasmas
modeled by static screened Coulomb potentials. The screening effects of the plasma …

The Rayleigh-Ritz variational technique with a Hylleraas basis set is being tested for the first
time to estimate the structural modifications of a lithium atom embedded in a weakly coupled …

In this work, we propose a distorted wave method in the relativistic framework to analyze the
electron collision ionization process under the influence of strongly coupled semi-classical …

This work presents precise calculations of important electromagnetic transition amplitudes
along with details of their many-body correlations using the relativistic coupled-cluster …