Thin-shell wormholes from the regular Hayward black hole
This presentation explores how physicists construct thin-shell wormholes using Hayward's regular black hole as a foundation. The talk examines how magnetic monopole fields in non-linear electrodynamics power these exotic structures, investigates stability conditions under different equations of state, and reveals how Hayward's parameter expands the regions where stable wormholes can exist within general relativity.Script
Wormholes require exotic matter to stay open, a seemingly impossible demand that has frustrated physicists for decades. But what if a regular black hole, one without singularities, could provide the foundation for a stable shortcut through spacetime?
The researchers use Hayward's regular black hole as their starting point, a solution where magnetic monopole fields replace the troublesome singularity at the center. This parameter-controlled geometry becomes the raw material for constructing something far stranger: a traversable wormhole.
The method is elegantly surgical.
They slice two copies of Hayward spacetime at a carefully chosen radius, then stitch them together at a thin shell. The Israel junction conditions then reveal what kind of matter must live on that shell to hold the wormhole throat open.
The bad news: exotic matter is still required. The good news: the Hayward parameter dramatically expands the stability regions. By analyzing linear perturbations around equilibrium, the authors show that this regular black hole foundation makes stable wormholes far more achievable than with classical Schwarzschild geometry.
The researchers tested multiple equations of state for the shell matter, computationally mapping where stability exists. The pattern is clear: Hayward's regular geometry consistently outperforms singular alternatives, offering a promising route to stable wormholes without abandoning Einstein's general relativity.
A wormhole built on a singularity-free foundation turns out to be more stable than one built on a classical black hole, suggesting that the path to traversable shortcuts through spacetime may require rethinking the very structure of extreme gravity. Visit EmergentMind.com to explore more cutting-edge research and create your own video presentations.
