# The universality of islands outside the horizon

@inproceedings{He2021TheUO, title={The universality of islands outside the horizon}, author={Song He and Yuan Sun and Longhua Zhao and Yu-Xuan Zhang}, year={2021} }

We systematically calculate the quantum extremal surface (QES) associated with Hawking radiation for general D-dimensional (D ≥ 2) asymptotically flat (or AdS) eternal black holes using the island formula. By adopting the standard ”black hole couples thermal baths” model, we find that a QES exists in the near-horizon region outside the black hole when c ·G(D) is smaller enough where c is the central charge of the conformal matter and G(D) the Newton constant. The locations of the QES in these…

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