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In this note we report on some new results \cite{SHP} on corrections to theCasimir-Polder \cite{caspol} retardation force due to atomic motion and presenta preliminary (unpublished) critique on one recently proposed cavity QEDdetection scheme of Unruh effect \cite{Unr76}. These two well-known effectsarise from the interaction between a moving atom or detector with a quantumfield under some boundary conditions introduced by a conducting mirror/cavityor dielectric wall. The Casimir-Polder force is a retardation force on the atomdue to the dressing of the atomic ground state by the vacuum electromagneticfield in the presence of a conducting mirror or dielectric wall. We haverecently provided an improved calculation by treating the mutual influence ofthe atom and the (constrained) field in a self-consistent way. For an atommoving adiabatically, perpendicular to a mirror, our result finds a coherentretardation correction up to twice the stationary value. Unruh effect refersloosely to the fact that a uniformly accelerated detector feels hot. Two priorschemes have been proposed for the detection of `Unruh radiation', based oncharged particles in linear accelerators and storage rings. Here we areinterested in a third scheme proposed recently by Scully {\it et al}\cite{Scully03} involving the injection of accelerated atoms into a microwaveor optical cavity. We analyze two main factors instrumental to the purportedsuccess in this scheme, the cavity factor and the sudden switch-on factor. Weconclude that the effects engendered from these factors are unrelated to theUnruh effect.Comment: to appear in J. of Optics B -- condensed matte

Vacuum fluctuations and moving atoms/detectors: from the Casimir–Polder to the Unruh–Davies–DeWitt–Fulling effect