Abstract
The purpose of this paper is to review relativistic quantum theories with an invariant evolution parameter. Parametrized relativistic quantum theories (PRQT) have appeared under such names as constraint Hamiltonian dynamics, four-space formalism, indefinite mass, micrononcausal quantum theory, parametrized path integral formalism, relativistic dynamics, Schwinger proper time method, stochastic interpretation of quantum mechanics and stochastic quantization. The review focuses on the fundamental concepts underlying the theories. Similarities as well as differences are highlighted, and an extensive bibliography is provided.
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Bibliography
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Fanchi, J.R. Review of invariant time formulations of relativistic quantum theories. Found Phys 23, 487–548 (1993). https://doi.org/10.1007/BF01883726
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DOI: https://doi.org/10.1007/BF01883726