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arXiv quant-ph/0202060quant-ph
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关于“时空代数中的狄拉克理论”的一点评论

Comments on "Dirac theory in spacetime algebra"

William E. Baylis

摘要:

与Hestenes和本文作者的Dirac理论的公式相反,W。P. Joyce [J. Phys. A:Math.Gen.34(2001)1991- 2005]的结果仅在质量为零的情况下与通常的Dirac方程等价。对于非零质量,乔伊斯方程的解可以是海丝坦形式的狄拉克方程的解,也可以是质量符号相反的狄拉克方程的解,一般来说,它们是两种可能性的混合。由于这种关系,乔伊斯获得了两倍的线性无关的平面波解决方案,为一个给定的动量本征值存在于传统的理论。本文还简要地讨论了关于Hestenes方程对称性和代数旋量几何意义的一个误解。

英文摘要:

In contrast to formulations of the Dirac theory by Hestenes and by the current author, the formulation recently presented by W. P. Joyce [J. Phys. A: Math. Gen. 34 (2001) 1991--2005] is equivalent to the usual Dirac equation only in the case of vanishing mass. For nonzero mass, solutions to Joyce's equation can be solutions either of the Dirac equation in the Hestenes form or of the same equation with the sign of the mass reversed, and in general they are mixtures of the two possibilities. Because of this relationship, Joyce obtains twice as many linearly independent plane-wave solutions for a given momentum eigenvalue as exist in the conventional theory. A misconception about the symmetry of the Hestenes equation and the geometric significance of the algebraic spinors is also briefly discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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