Abstract
H. S. PERLMAN assumes that H is a self-adjoint operator, operating in Hilbert space. This assumption is not valid in quantum electrodynamics. H, like the other dynamical variables, then operates on vectors in some kind of space, larger than a Hilbert space, the nature of which is unknown.
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DIRAC, P. Equivalence of the Schroedinger and Heisenberg Pictures. Nature 204, 772 (1964). https://doi.org/10.1038/204772a0
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DOI: https://doi.org/10.1038/204772a0
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