2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91538We study the physical content of the PT-symmetric complex extension of quantum mechanics as proposed in Bender et al, Phys. Rev. Lett. 80, 5243 (1998) and 89, 270401 (2002), and show that as a fundamental probabilistic physical theory it is neither an alternative to nor an extension of ordinary quantum mechanics. We demonstrate that the definition of a physical observable given in the above papers is inconsistent with the dynamical aspect of the theory and offer a consistent notion of an observable.11 pagesQuantum PhysicsHigh Energy Physics - TheoryMathematical Physicstext