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Quantum Mechanical Systems with Indefinite Metric. I
Phys. Rev. 123, 2183 – Published 15 September, 1961
DOI: https://doi.org/10.1103/PhysRev.123.2183
Abstract
The structure of quantum theories with indefinite metric is studied with the aid of several simple models. It is shown that the pseudo-unitary scattering matrices entering such a theory are not inconsistent with physical interpretation provided a suitable invariant projection of physical state is carried out from among all the states. A relativistic quantum theory of interacting fields is outlined and is suggested as a basis for a dynamical theory of elementary particles. It is argued that the formal introduction of an indefinite metric together with supplementary interpretive postulates may help to reinstate the principle of simplicity in a consistent theory of elementary particles.
See Also
Quantum Mechanical Systems with Indefinite Metric. II
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