Topological censorship

Topological censorship

The topological censorship theorem states that general relativity does not allow an observer to probe the topology of spacetime: any topological structure collapses too quickly to allow light to traverse it. More precisely, in a globally hyperbolic, asymptotically flat spacetime satisfying the null energy condition, every causal curve from past null infinity to future null infinity is homotopic to a topologically trivial curve from past null to future null infinity.

References

*cite journal
author = John L. Friedman, Kristin Schleich, and Donald M. Witt
year = 1993
title = Topological Censorship
journal = Phys.Rev.Lett.
volume = 71
pages =1486–1489
doi = 10.1103/PhysRevLett.71.1486


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