This review summarizes the current status of the energy conditions in general relativity and
quantum field theory. We provide a historical review and a summary of technical results and …

Black-bounce to traversable wormhole Page 1 Journal of Cosmology and Astroparticle
Physics Black-bounce to traversable wormhole To cite this article: Alex Simpson and Matt …

For distant observers, black holes are trapped spacetime domains bounded by apparent
horizons. We review properties of the near-horizon geometry emphasizing the …

We develop a number of novel “black-bounce” spacetimes. These are specific regular black
holes where the area radius always remains nonzero, thereby leading to a “throat” that is …

Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical
and observational purposes it becomes interesting to see whether it might be possible to …

We discuss in detail the distributions of energy, radial pressure and tangential pressure
inside the nucleon. In particular, this discussion is carried on in both the instant form and the …

Standard models of “regular black holes” typically have asymptotically de Sitter regions at
their cores. Herein, we shall consider novel “hollow” regular black holes, those with …

Static and stationary regular black holes are examined under a minimal set of requirements
consisting of (i) the existence of a well defined event horizon and (ii) the weak energy …

Based on the recently introduced black-bounce spacetimes, we shall consider the
construction of the related spherically symmetric thin-shell traversable wormholes within the …

We consider a non-static evolving version of the regular'black-bounce'/traversable wormhole
geometry recently introduced in Simpson and Visser (2019 J. Cosmol. Astropart. Phys …