paper

Classical Aspects of Quantum Walls in One Dimension

arXiv:quant-ph/0111057 · doi:10.1103/PhysRevA.66.052102

Abstract

We investigate the system of a particle moving on a half line x >= 0 under the general walls at x = 0 that are permitted quantum mechanically. These quantum walls, characterized by a parameter L, are shown to be realized as a limit of regularized potentials. We then study the classical aspects of the quantum walls, by seeking a classical counterpart which admits the same time delay in scattering with the quantum wall, and also by examining the WKB-exactness of the transition kernel based on the regularized potentials. It is shown that no classical counterpart exists for walls with L < 0, and that the WKB-exactness can hold only for L = 0 and L = infinity.

TeX, 21 pages, 4 figures. v2: some parts of the text improved, new and improved figures

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