Abstract
The Cabibbo-Ferrari derivation of the Dirac charge quantization condition in electromagnetism is extended to the gravitational field. This is accomplished by use of the pathdependent formalism pioneered by Mandelstam. As a result, we find that the Bianchi identity generalizes to include a quantized, singular source term for the dual Riemann tensor. Under reasonable assumptions, this source term is proportional to the divergence of the energy-momentum tensor, leading to a quantized violation of local energy conservation. Specifically, it is found that the magnitude of the time rate of appearance of three-momentum in any volume of three-space must be an integer multiple of 3c 4/2G. Some physical aspects of this energy nonconservation are briefly considered.
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Riegert, R.J. Quantized singularities in the gravitational field. Int J Theor Phys 15, 121–155 (1976). https://doi.org/10.1007/BF01807755
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DOI: https://doi.org/10.1007/BF01807755