Dawson-Furnstahl计算方案与Dirac空穴理论的联系 (英文)

Relation of Dawson Furnstahl’s Empty Sea Ansatz to Dirac’s Hole Theory

在相对论无规位相近似中 ,有两种顾及负能态贡献的方法 .一种是由Dawson和Furnstahl(DF)提出的计算方案 .他们假定Dirac海是空的 .另外一种就是Dirac空穴理论 ,它认为负能海的全充满的 .这两种方法在顾及负能态贡献上看似完全对立 .文章中考察了这两种方法的关系 ,并给出了DF方法的适用范围 .

There are two methods to take account of the contribution of negative energy states in the relativistic random phase approximation. One is due to Dawson and Furnstahl. They made the ansatz that the Dirac sea is empty. The other is the Dirac hole theory, which postulated that the sea should be fully occupied. The two methods seem contradictory concerning the way through which the negative-energy states contribute. The relation between the two theories is studied and the conditions under which the Dawson-Furnstahl theory is a good approximation to the Dirac theory are enunciated.