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Instability of supersymmetric microstate geometries

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If you have a question about this talk, please contact Christopher Moore.

I will talk about the classical stability of black hole microstate geometries. These have an “evanescent ergosurface”: a timelike hypersurface of infinite redshift on which there are stably trapped null geodesics. I will discuss the consequences of such a surface and of stable trapping of geodesics. This includes a heuristic argument for non-linear stability due to these geodesics. Linear perturbations decay particularly slowly in these microstates geometries, and I will discuss the relation to the stably trapped null geodesics and how this slow decay of linear perturbations could be an indication of non-linear instability.

This talk is part of the DAMTP Friday GR Seminar series.

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