Exponential metric represents a traversable wormhole
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DOI: 10.1103/physrevd.98.084048
Abstract: For various reasons a number of authors have mooted an "exponential form" for the spacetime metric: \[ ds^2 = - e^{-2m/r} dt^2 + e^{+2m/r}\{dr^2 + r^2(d\theta^2+\sin^2\theta \, d\phi^2)\}. \] While the weak-field behaviour matches nicely… read more here.
Keywords: traversable wormhole; exponential metric; field; geometry ... See more keywords