Akademik Veri Yönetim Sistemi
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, cilt.29, sa.21, ss.6967-6982, 1996 (SCI-Expanded)
The eigenvalue problem in L(2)(R(2)) of Schrodinger operators with a polynomial perturbation has been replaced by one corresponding to the system confined in a box Omega with impenetrable walls. It is shown that the Dirichlet and the von Neumann problems in L(2)(Omega) generate upper and lower bounds, respectively, to the eigenvalues of the unbounded system. To illustrate the method, rapidly converging two-sided bounds for the energy levels of two- and three-well oscillators are presented, using simple trigonometric basis functions.