Abstract

FERNANDEZ PALOP, J.I.. Decay of a quantum discrete state resonantly coupled to a quasi-continuum set of states. Rev. mex. fís. E [online]. 2009, vol.55, n.1, pp.112-117. ISSN 1870-3542.

The irreversible exponential decay from a discrete state to the continuum, described by time-dependent perturbation theory, is a difficult task in quantum mechanics learning, because of the complexity of the mathematical tools involved. An easy model which consists in analyzing the decay from a discrete state to a quasi-continuum set of states is developed. The mathematics required to understand the model are easy, allowing for a deep analysis of the model. The physical conditions required to describe the transition produced by a sinusoidal perturbation by an exponential decay are easily deduced.

Keywords : Exponential decay; time-dependent perturbation theory; Zeno quantum effect.

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