Secondly, we investigate the energy density produced by a state vector which is the superposition of three single electron states in the Diracfield in the four-dimensional Minkowski spacetime.
然后，研究了在四维平直时空下三个单粒子态构成的量子态的负能密度。
2
In Sect. 4.3.4 we show that the Dirac operator in an external field has the same essential spectrum as the free Dirac operator provided the potential vanishes at infinity.
A class of exact solutions of the Dirac equation are obtained for an electron in the electromagnetic field of a wave guide formed by two pairs of hyperbolic cylinders.