The Bound States of Photon Pairs

The properties of the polarization operator arising in the Г - operator method proposed in [1] for the
studies of the correlation effects of quantum optics are investigated. This kind of polarization operator
indicates the existence in the temperature excited media of bound photonic pairs, formally resembling
the associated states of electrons in the theory of superconductivity. To break photonic pairs requires
certain energy, reminiscent of the energy gap in the superconductors. The elementary optical
excitation in media that occurs when the inclusion of external monochrome disturbance frequency hck
, along with photon pairs and signal frequency hck also contain signals with a frequencyhck 2hck
that is formally reminiscent of the Josephson effect. As in the theory of superconductivity, the
presence of a medium is required for the formation of coupled pairs. The increase in temperature and
concentration of excited atoms of the medium leads to an increase in the number of photon pairs and
a loss of thermodynamic stability of the system. The formation of photon pairs manifests itself in all
optical effects in excited media. The possibility of propagation of quasi-resonant electromagnetic
radiation in dissipative media at a finite temperature with a small absorption is predicted to be
unrelated to the laser effect.