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。
Secondly, we investigate the energy density produced by a state vector which is the superposition of three single electron states in the Dirac field in the four-dimensional Minkowski spacetime.
给出了四维坐标变量的几率密度函数公式，并简述了相应的抽样方法。
The probability function for the four dimensional new variables are derived and the sample procedures f…
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