Poissonian Distributions in Physics: Counting Electrons and Photons

Poissonian Distributions in Physics: Counting Electrons and Photons: Here we discuss physics containing Poissonian distributions. Among the phenomena, we find thermoionic emission of electrons, photodetection and  Poisson noise.  After a description of the Hanbury Brown - Twiss  effect,  we will consider the second order correlation of intensity and Poissonian, super- and sub-Poissonian lights. The quadrature and squeezed states will be also considered.