Affiliation: | (1) Center for Nonlinear Studies, MS-B258, Los Alamos National Laboratory, 87545 Los Alamos, New Mexico;(2) FB7, Physik, Universität Essen, D43 Essen 1, West Germany;(3) Department of Physics and Institute for Nonlinear Studies, Clarkson University, 13676 Potsdam, New York;(4) P10, MS-K764, Los Alamos National Laboratory, 87545 Los Alamos, New Mexico |