2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156018We consider a measurement of finite-frequency current fluctuations, using a resonance circuit as a model for the detector. We arrive at an expression for the measurable response in terms of the current-current correlators which differs from the standard (symmetrized) formula. The possibility of detection of vacuum fluctuations is discussed.It is shown that zero-point fluctuations of current at a given frequency are not measurable in a natural set-up. Asymmetric spectral density of noise introducedMesoscale and Nanoscale PhysicsStatistical Mechanicstext