Physics – General Physics
Scientific paper
2009-06-04
Physics
General Physics
12 pages
Scientific paper
In this paper, we define a scalar complex potential $\mathcal{S}$ for an arbitrary electromagnetic field. This potential is a modification of the two scalar potential functions introduced by E. T. Whittaker. By use of a complexified Minkowski space $M$, we decompose the usual Lorentz group representation on $M$ into a product of two commuting new representations. These representations are based on the complex Faraday tensor. For a moving charge and for any observer, we obtain a complex dimensionless scalar which is invariant under one of our new representations. The scalar complex potential is the logarithm of this dimensionless scalar times the charge value. We define a conjugation on $M$ which is invariant under our representation. We show that the Faraday tensor is the derivative of the conjugate of the gradient of the complex potential. The real part of the Faraday tensor coincides with the usual electromagnetic tensor of the field. The potential $\mathcal{S}$, as a complex-valued function on space-time, is described as an integral over the distribution of the charges generating the electromagnetic field. This potential is like a wave function description of the field. If we chose the Bondi tetrad (called also Newman-Penrose basis) as a basis on $M$, the components of the Faraday vector at each point may be derived from $\mathcal{S}$ by $ F_j=E_j+iB_j={\partial}^\nu (\alpha_j)_\nu^\lambda{\partial}_\lambda \mathcal{S}$, where $(\alpha_j)$ are the known $\alpha$-matrices of Dirac. This fact indicates that our potential may build a "bridge" between classical and quantum physics.
Friedman Yaakov
Gwertzman S.
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