L. Roa, A. Kruegel and C. Saavedra
PHYSICS LETTERS A 366, 6 (2007)
We study the stability of the coherence of a pure state of a quantum system under the effect of an interaction with another quantum system during a short time. We find an expression for evaluating the order of magnitude of the time scale for the onset of the decoherence. Applying that expression, we analyze decoherence-instability of three illustrative cases. (c) 2007 Elsevier B.V. All rights reserved.