Instability of flat space enclosed in a cavity.
We consider a spherically symmetric self-gravitating massless scalar field enclosed inside a timelike worldtube R×S(3) with a perfectly reflecting wall. Numerical evidence is given that arbitrarily small generic initial data evolve into a black hole.
M. Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Kraków, Poland.
Maciej
M
Maliborski