Positronium atom in optical laser field. Radiative energy shift and annihilation decay kinetics of the positronium atom

The theory on quanta transitions in a positronium atom with an account of two-photon annihilation decay and optical transitions between two arbitrary states of the positronium atom is developed. The consideration is performed on the basis of sixteen Heisenberg equations for photon and atom operators without perturbations theory. Radiative shifts in the positronium atom energy levels, phase relaxation time and positronium atom life-time with an account of spontaneous and forced optical transitions between two quanta states are calculated on the basis of these equations solution. 15 refs