Enhanced self-action effects by electromagnetically induced transparency in the two-level atom

Electromagnetically induced transparency (EIT) has been studied primarily within the context of multilevel atomic systems. We show that EIT can occur also in a two-level atomic system and can lead to strong self-action and slow-light effects that are not hampered by material absorption, with important potential implications for processes such as squeezed-light generation and the propagation of optical solitons.