Deviations from exponential law and Van Hove's “λ2t” limit

P Facchi and S Pascazio

Physica A: Statistical Mechanics and its Applications, 1999, vol. 271, issue 1, 133-146

Abstract: The deviations from a purely exponential behavior in a decay process are analyzed in relation to Van Hove's “λ2t” limiting procedure. Our attention is focused on the effects that arise when the coupling constant is small but nonvanishing. We first consider a simple model (two-level atom in interaction with the electromagnetic field), then gradually extend our analysis to a more general framework. We estimate all deviations from exponential behavior at leading orders in the coupling constant.

Keywords: Exponential law; Fermi Golden Rule; Markovianity (search for similar items in EconPapers)
Date: 1999
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:271:y:1999:i:1:p:133-146

DOI: 10.1016/S0378-4371(99)00209-5

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