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Self-collision of a portal wormhole

Jul. 22 - 14:30 - 2021

Speaker: Justin Feng (CENTRA, IST)

Title: Self-collision of a portal wormhole

Portals (also known as loop based thin shell wormholes or gates in the literature) are wormholes supported by a single loop of negative mass, negative tension cosmic string and have the property that the geometry is everywhere flat except at the cosmic string. In this talk, I describe the construction, topology, and smoothing of portals, and consider what happens if one attempts to collide the mouths of a portal, which naively resembles a topology changing process. For a simple anisotropic fluid, it is found that in general relativity, portal mouths do not experience an acceleration as they are brought together, and a curvature singularity forms in the limit that the separation distance vanishes.

Room: ZOOM videoconference (contact justin.feng@tecnico.ulisboa.pt for URL)

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