Van Hove's "λ2 t" limit in nonrelativistic and relativistic field-theoretical models
P. Facchi, S. Pascazio
Abstract
Van Hove's "λ2 t" limiting procedure is analyzed in some interesting quantum field theoretical cases, both in nonrelativistic and relativistic models. We look at the deviations from a purely exponential behavior in a decay process and discuss the subtle issues of state preparation and initial time.
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