A new aspects of physics of a photon gas
  Bose-Einstein condensation (BEC) and evaporation of transverse photons from the Bose condensate is studied in the case when the density of plasma does not change. The generation of the longitudinal photons (photonikos) by the transverse photons (photons) in terms of the Cherenkov type of radiation in a uniform plasma is demonstrated. The Bogoliubov energy spectrum is derived for photonikos. A new physical phenomena of the "Compton" scattering type in nonlinear photon gas is discussed. To this end, a new version of the Pauli equation in the wavevector representation is derived. The formation of Bose-Einstein condensate and evaporation of photons from the condensate is investigated by means of the newly derived Fokker-Planck equation for photonikos. The relevance of this work to recent discovery of black hole X-ray jets is pointed out. 
Levan N. Tsintsadze