A semiclassical, phenomenological model to derive photoelectron current pulse (PCP) statistics

Photonic quantum information consists of photoelectron current pulses (PCP) generated by the combined instrumentation of a photoelectron releasing device plus a built-in, or a follow-on, technologies that amplify the first photoelectron into a countable current pulse of about 1ps consisting of many millions of electrons. We present a semiclassical, phenomenological interaction-process model behind the generation of statistically random PCP's. Atom emitted signals carry QM predicted energy hν & carrier frequency ν but propagate as classically spreading diffractive, exponential pulses. Exponential pulse shape is justified from the observation that classical spectrometers register the line shape for spontaneous emissions as Lorentzian, which is a Fourier transform of an exponential function. The pulses are emitted randomly from different atoms. So one pulse cannot deliver the full energy hν to an atomic site to release one quantum mechanically bound electron. We need a very large number of light pulses simultaneously present during the stimulation period of ~100 fs to release each individual photoelectron, which then generates the countable PCP's through the electron-number amplification. The origin of different PCP statistics is due to the statistically different phases and arrival times of the light pulses generated (i) spontaneously, (ii) by stimulated emission, or (iii) by nonlinear processes. Some computational results pertaining to the above ideas will be presented.