2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/124683The photon density operator function is used to describe the propagation of single-photon pulses through a turbulent atmosphere. The effects of statistical properties of photon source and the effects of a random phase screen on the variance of photon counting are studied. A procedure for reducing the total noise is discussed. The physical mechanisms responsible for this reduction are explained.14 pages, 3 figuresQuantum Physicstext