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Résumé |
An infalling shell in the hard wall model provides a simple holographic model for energy injection in a
confining gauge theory. Depending on its parameters, a scalar shell either collapses into a large black
brane, or scatters between the hard wall and the anti-de Sitter boundary. In the scattering regime, we find
numerical solutions that keep oscillating for as long as we have followed their evolution, and we provide an
analytic argument that shows that a black brane can never be formed. This provides examples of states in
infinite-volume field theory that never thermalize. We find that the field theory expectation value of a
scalar operator keeps oscillating, with an amplitude that undergoes modulation. |
