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Multi-mouth Traversable Wormholes · Around

2020

Multi-mouth Traversable Wormholes

Emparan, Roberto, Grado-White, Brianna, Marolf, Donald et al.

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We describe the construction of traversable wormholes with multiple mouths in four spacetime dimensions and discuss associated quantum entanglement.

Our wormholes may be traversed between any pair of mouths.
In particular, in the three-mouth case they have fundamental group $F_2$ (the free group on two generators).
By contrast, connecting three regions $A,B,C$ in pairs ($AB$, $BC$, and $AC$) using three separate wormholes would give fundamental group $F_3$.

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