Quantum metastability in a class of moving potentials

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Title:	Quantum metastability in a class of moving potentials
Authors:	Lee, Chung-Chieh;Ho, Choon-Lin
Contributors:	淡江大學物理學系
Keywords:	Mathematical transformations;Potential energy;Probability;Scattering;Moving potential;Quantum metastability;Schrodinger equation;Quantum theory
Date:	2004-04
Issue Date:	2013-07-09 15:07:54 (UTC+8)
Publisher:	College Park: American Physical Society
Abstract:	In this paper we consider quantum metastability in a class of moving potentials introduced by Berry and Klein. This class of potential has height and width scaled in a specific way so that it can be transformed into a stationary one. While deriving the nondecay probability of the system, we demonstrate that the appropriate technique to use is the less well known method of scattering states. This method is illustrated through two examples, namely, a moving δ-function potential and a moving barrier potential. For expanding potentials, one finds that a small but finite nondecay probability persists at large times. Generalization to scaling potentials of arbitrary shape is briefly outlined.
Relation:	Physical Review A (Atomic, Molecular, and Optical Physics) 65(2), 022111(8pages)
DOI:	10.1103/PhysRevA.65.022111
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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