EIT/EIA Resonances Driven by the Light Field of Elliptically Polarized Waves

Outside of the perturbation theory for bichromatic field of two co-propagating elliptically polarized waves, the type of the subnatural (electromagnetically induced transparency (EIT) or absorption (EIA)) resonance is theoretically found to determined only by the angular momenta of the ground (F
g
) and the excited (F
e
) states of atomic gas. Herewith, the spontaneous transfer of anisotropy from the excited state to the ground one leads to the formation of the EIA resonance at the transition F
g
= F → F
e
= F + 1.