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gr-qc2018
Black-bounce to traversable wormhole
Alex Simpson, Matt Visser
So-called "regular black holes" are a topic currently of considerable interest in the general relativity and astrophysics communities. Herein we investigate a particularly interest…
gr-qc2018
The exponential metric represents a traversable wormhole
Petarpa Boonserm, Tritos Ngampitipan, Alex Simpson +1
For various reasons a number of authors have mooted an "exponential form" for the spacetime metric: \[ ds^2 = - e^{-2m/r} dt^2 + e^{+2m/r}\{dr^2 + r^2(dθ^2+\sin^2θ\, dϕ^2)\}. \] Wh…