Title: Pseudopotential for Many-Electron Atoms and Ions,
Abstract: Electron-electron correlation forms the basis of difficulties encountered in
many-body problems. Accurate treatment of the correlation problem is likely to
unravel some nice physical properties of matter embedded in this correlation.
In an effort to tackle this many-body problem, two complementary parameter-free
pseudopotentials for $n$-electron atoms and ions are suggested in this study.
Using one of the pseudopotentials, near-exact values of the groundstate
ionization potentials of helium, lithium, and berrylium atoms have been
calculated. The other pseudopotential also proves to be capable of yielding
reasonable and reliable quantum physical observables within the
non-relativistic quantum mechanics.