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We investigate the influence of the vacuum fluctuations of a backgroundelectric field over a charged test particle in the presence of a perfectlyreflecting flat wall. A switching function connecting different stages of thesystem is implemented in such a way that its functional dependence isdetermined by the ratio between the measuring time and the switching duration.The dispersions of the velocity components of the particle are found to besmooth functions of time, and have maximum magnitudes for a measuring timecorresponding to about one round trip of a light signal between the particleand the wall. Typical divergences reported in the literature and linked with anoversimplification in modeling this system are naturally regularized in ourapproach. Estimates suggest that this sort of manifestation of quantum vacuumfluctuations over the motion of the particle could be tested in laboratories.

Probing quantum vacuum fluctuations over a charged particle near a reflecting wall