Showing papers on "Schwinger variational principle published in 1993"
TL;DR: The replica Ornstein-Zernike (ROZ) equations in the hypernetted-chain (HNC), Percus-Yevick (PY), and reference Percus and RPY approximations for partly quenched systems for porous media are solved.
Abstract: The mutlichannel Schwinger variational formalism in the momentum space has been used to investigate elastic scattering and the ground-state positronium formation process in the positron-hydrogen collisions in the Ore gap region, 6.8--10.2 eV. The s-wave results obtained by employing a correlated discrete basis set are found to be in agreement with existing accurate Kohn variational results of Humberston [Can. J. Phys. 60, 591 (1982)].
8 citations