Gravitational vacuum condensate stars

E Mottola - Regular Black Holes: Towards a New Paradigm of …, 2023 - Springer
Gravitational vacuum condensate stars, proposed as the endpoint of gravitational collapse
consistent with quantum theory, are reviewed. Gravastars are cold, low entropy, maximally …

Inner horizon instability via the trace anomaly effective action

J Arrechea, G Neri, S Liberati - arxiv preprint arxiv:2411.14964, 2024 - arxiv.org
In quantum field theory applied to black hole spacetimes, substantial evidence suggests that
the Unruh and Hartle-Hawking vacuum states become singular at Cauchy horizons. This …