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Topology Change in General Relativity
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A review is given of recent work on topology changing solutions to the first order form of general relativity. These solutions have metrics which are smooth everywhere, invertible almost everywhere, and have bounded curvature. The importance of considering degenerate metrics is discussed, and the possibility that quantum effects can suppress topology change is briefly examined.
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Cited by 3 Pith papers
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Smooth horizons from topology change in canonical quantum gravity
Topology change in canonical JT gravity resolves the firewall paradox by making the connected two-interior branch dominate after Page time, with gravitational constraints annihilating the firewall branch and identifyi...
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Bag-of-gold spacetimes, Euclidean wormholes, and inflation from domain walls in AdS/CFT
Smooth Euclidean saddles with thin domain walls cannot create inflating interiors in AdS, but can create arbitrarily large bag-of-gold geometries at fixed black hole entropy.
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