Physics – Quantum Physics
Scientific paper
2000-05-11
Physics
Quantum Physics
69 pages, Latex, no figure, no table; more ackowledgment added, typos corrected
Scientific paper
10.1006/aphy.2000.6102
We present a new method to derive low-lying N-dimensional quantum wave functions by quadrature along a single trajectory. The N-dimensional Schroedinger equation is cast into a series of readily integrable first order ordinary differential equations. Our approach resembles the familiar W.K.B. approximation in one dimension, but is designed to explore the classically forbidden region and has a much wider applicability than W.K.B.. The method also provides a perturbation series expansion and the Green's functions of the wave equation in N-dimension, all by quadratures along a single trajectory. A number of examples are given for illustration, including a simple algorithm to evaluate the Stark effect in closed form to any finite order of the electric field.
Friedberg Richard
Lee D. T.
Zhao Q. W.
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