4 papers
Characterization of exotic matter in PT-symmetric wormholes
Hicham Zejli
In our previous work [H. Zejli, Int. J. Mod. Phys. D 34, 2550052 (2025), arXiv:2508.00035], we introduced a PT-symmetric wormhole model based on a bimetric geometry, capable of gen…
Closed timelike curves in PT-symmetric wormholes
Hicham Zejli
We investigate a modified Einstein-Rosen wormhole model, made unidirectionally traversable through a bimetric geometry defined by two regular metrics, g(+) and g(-), and characteri…
A bimetric cosmological model based on Andrei Sakharov's twin universe approach
Petit Jean-Pierre, Margnat Florent, Zejli Hicham
The standard cosmological model, based on Cold Dark Matter and Dark Energy (ÎCDM), faces several challenges. Among these is the need to adjust the scenario to account for he prese…
PT-symmetry in one-way wormholes
Pascal Koiran, Hicham Zejli, J-P Levy +3
In a recent paper, we studied a modified version of the Einstein-Rosen bridge. This modified bridge is traversable and works as a one-way membrane: a particle on the first sheet fa…