Advanced dynamics, observational signatures, and PT-symmetric quantum aspects of particle-creation-induced traversable wormholes

This study presents a theoretical and phenomenological analysis of traversable wormholes supported by gravitational particle creation. We extend the underlying framework by performing a stability analysis using a spectral method, computing the quasinormal-mode spectrum, and evaluating the dynamical response to scalar, electromagnetic, and axial gravitational perturbations. We also construct illustrative synthetic images based on an idealized thin-disk model and apply ray-tracing techniques to examine shadow radii, photon-ring structures, and intensity profiles. These quantities are proposed as potential discriminants rather than as evidence that wormholes have been observed. In addition, we explore a possible connection between the particle-creation mechanism and PT-symmetric quantum field theory. Within this effective framework, the exotic stress at the throat may be represented by a lightlike thin layer satisfying appropriate junction conditions, with possible implications for nonreciprocal transmission. The resulting quasinormal spectra and optical observables provide benchmark signatures that can be tested against future gravitational-wave and very-long-baseline-interferometric data, subject to the simplifying assumptions of the model.