Instability of Minkowski spacetime enclosed in a cavity [PDF]
Maciej MaliborskiWe consider a spherically symmetric self-gravitating massless scalar field enclosed inside a timelike worldtube $R\times S^3$ with the perfectly reflecting wall. Numerical evidence is given that arbitrarily small generic initial data evolve into a black hole.View original: http://arxiv.org/abs/1208.2934
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