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On Expected Values and “Negative Probability” in 4-Space QED

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Abstract

A proposed 4-space Dirac theory requires modified definitions of expected value and Hermitian operator, because the charge density is not positive definite. However, this does not imply negative probability.

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  1. A. B. Evans
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Evans, A.B. On Expected Values and “Negative Probability” in 4-Space QED. Foundations of Physics 28, 291–306 (1998). https://doi.org/10.1023/A:1018709021115

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