2003/12/31 by E. Comay
Physics and Astronomy · #quant-ph
published as Apeiron, 11, No. 3, 1 (2004) · 11 pages, 0 figures
arxiv created 2004/09/08 · arxiv updated 2009/12/01
Relying on the variational principle, it is proved that new contradictions emerge from an analysis of the Lagrangian density of the Klein-Gordon field: normalization problems arise and interaction with external electromagnetic fields cannot take place. By contrast, the Dirac equation is free of these problems. Other inconsistencies arise if the Klein-Gordon field is regarded as a classical field.