Strong cosmic censorship for de Sitter black holes

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• Flavio Rossetti (Gran Sasso Science Institute)
• Friday 24 October 2025, 13:00-14:00
• Potter Room / Zoom .

If you have a question about this talk, please contact Daniela Cors.

We discuss modern formulations of the strong cosmic censorship conjecture (SCCC) and possible resolutions supported by rigorous non-linear results for the spherically symmetric Einstein-Maxwell-scalar field system. We show that the presence of a positive cosmological constant suggests a violation of the SCCC at a fundamental level of regularity. Indeed, the blueshift mechanism occurring at the Cauchy horizon can be counterbalanced by the dispersive effects encoded in the exponential Price law along (cosmological) black hole event horizons. On the other hand, we show that, if non-smooth black hole solutions are allowed, then the aforementioned violations are non-generic in a positive co-dimension sense.

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

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