In this paper, we demonstrated that the multiple turning point problems within the framework of the Wentzel-Kramers-Brillouin (WKB) approximation method can be reduced to two turning point one for a ...

A new method for predicting inflationary cosmological perturbations, based on the Wentzel-Kramers-Brillouin (WKB) approximation, is presented. A general expression for the WKB scalar and tensor power ...

Abstract: In this note we present a powerful new approach to the analysis of a class of linear, degenerate gradient flow systems that frequently arise in adaptive control and system identification.

Abstract: In modern fabrication techniques, it is possible to fabricate nanostructure based semiconductor devices whose dimensions are much more comparable to the de Broglie wavelength of the electron ...

Department of Applied Physics, Tafila Technical University, Tafila, Jordan. The quantization of constrained systems has been started by Dirac [1] . The quantization of constrained systems has been ...

ABSTRACT: Within the frames of semiclassical approach, intra-atomic electric field potentials are parameterized in form of radial step-like functions. Corresponding parameters for 80 chemical elements ...