Apart from the mathematical properties of the Dirac operator we investigate the behavior of observables such as position, velocity, momentum, describe the Zitterbewegung, and formulate the localization problem.

• 除了狄拉克算子的数学工具之外,我们研究诸如位置，速度，动量等看得见的客观属性，描述了颤振，并阐述一些局部问题。