An Exact Approach to the Oscillator Radiation Process in an Arbitrarily Large Cavity

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dc.creatorAndion, N. P.
dc.creatorMalbouisson, A. P. C.
dc.creatorNeto, A. Mattos
dc.date2000-01-05
dc.date.accessioned2026-07-07T10:54:54Z
dc.date.available2026-07-07T10:54:54Z
dc.descriptionStarting from a solution of the problem of a mechanical oscillator coupled to a scalar field inside a reflecting sphere of radius $R$, we study the behaviour of the system in free space as the limit of an arbitrarily large radius in the confined solution. From a mathematical point of view we show that this way of facing the problem is not equivalent to consider the system {\it a} {\it priori} embedded in infinite space. In particular, the matrix elements of the transformation turning the system to principal axis, do not tend to distributions in the limit of an arbitrarily large sphere as it should be the case if the two procedures were mathematically equivalent. Also, we introduce "dressed" coordinates which allow an exact description of the oscillator radiation process for any value of the coupling, strong or weak. In the case of weak coupling, we recover from our exact expressions the well known decay formulas from perturbation theory.
dc.description27 pages
dc.identifierhttps://arxiv.org/abs/physics/0001009
dc.identifierhttp://arxiv.org/abs/physics/0001009
dc.identifierJ.Phys.A34:3735-3750,2001
dc.identifierdoi:10.1088/0305-4470/34/18/303
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185948
dc.subjectAtomic Physics
dc.subjectHigh Energy Physics - Theory
dc.subjectMathematical Physics
dc.titleAn Exact Approach to the Oscillator Radiation Process in an Arbitrarily Large Cavity
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