COHERENT AND INCOHERENT OPTICAL PROCESSES AND PHASE SENSITIVE ADIABATIC STATES

摘要

The interaction of a quantum system (QS) with an electromagnetic field (EMF) represents a basical phenomenon for wide range of physical processes. In the optical phenomena, the main attention is normally paid to the evolution of the parameters of the optical fields. Among these, the optical phase plays a basical role when the optical processes are coherent. Since the field and matter (that mediates the interaction between the optical fields) participate in an apparently equivalent way in the interaction, it is naturally to rise up the question "What happens with the material phase?". It seems that the answer of this question is predetermined by the orthodoxal quantum mechanics, which gives physical meaning only to the modulus of the state vector.