Self-collision of a portal wormhole

Abstract: 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.

astrophysicsgeneral relativity and quantum cosmologyinstrumentation and detectors

Audience: researchers in the topic

CENTRA Seminar

Series comments: Recordings of the CENTRA seminars are posted at the following URL:

portal.educast.fccn.pt/videos?c=6865