title: Quantal density functional theory of excited states.
abstract: We explain by quantal density functional theory the physics of mapping from any bound nondegenerate excited state of Schrödinger theory to an S system of noninteracting fermions with equivalent density and energy. The S system may be in a ground or excited state. In either case, the highest occupied eigenvalue is the negative of the ionization potential. We demonstrate this physics with examples. The theory further provides a new framework for calculations of atomic excited states including multiplet structure.
authors.affiliation: The Graduate School of the City University of New York, New York, NY 10016, USA.
authors.forename: V
authors.initials: V
authors.lastname: Sahni
authors.forename: L
authors.initials: L
authors.lastname: Massa
authors.forename: R
authors.initials: R
authors.lastname: Singh
authors.forename: M
authors.initials: M
authors.lastname: Slamet