The exponential representation in the Coulomb three-body problem is considered. It is
shown that the exponential variational expansion in relative coordinates r 32, r 31 and r 21 …

A realistic three-parameter correlated wavefunction is used to construct an exact analytical
expression for the expectation value of the helium-atom Hamiltonian expressed in the …

For pt. I, see ibid., vol. 20, no. 8, p. 2043-75 (1987). Several coordinate systems for solving
the few-electron Schrodinger equation are presented. Formal solutions corresponding to …

Wave functions which are compact, but still quite accurate, are extremely valuable as tools
for gaining understanding of quantum systems. This paper investigates the use for that …

A compact yet accurate approach for representing the wave functions of members of the He
and Li isoelectronic series is using explicitly correlated wave functions. These wave …

The three-body Schrödinger equation is solved directly for the ground state of the
positronium negative ion by using a rapidly convergent correlation function hyperspherical …

The direct solution of the Schrödinger equation for the ground state of the ppμ, ddμ, and ttμ
molecular ions is obtained with the help of the correlation-function hyperspherical harmonic …

A simple correlated wavefunction (with explicit dependence upon the interelectronic
distance r 12) is presented. The use of new screened hydrogen-like orbitals allows the …

Recently, the doubly differential cross section for double ionization of helium by fast bare
carbon ions has been measured as a function of the longitudinal momentum components of …

A simple two-parameter wavefunction for the ground state of two-electron atoms has been
obtained by introducing variational parameters in the Hamiltonian rather than in the trial …