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…