Schedule Feb 18, 2021
How Soft Hair Dissolves the Firewall
Sabrina Pasterski, Princeton
Cite as: doi:10.26081/K6M91X

We build on the observation by Hawking, Perry and Strominger that a global black hole space-time supports a large number of soft hair degrees of freedom to shed new light on the firewall argument by Almheiri, Marolf, Polchinski, and Sully. The soft hair carries a sizable amount of entropy and is encoded in a transition function that connects the asymptotic and near horizon regions. We argue that an infalling observer automatically measures the classical value of the soft mode before reaching the horizon and that this measurement implements a code subspace projection that enables the reconstruction of interior operators. We use the soft hair dynamics to introduce an observer dependent notion of the firewall and show that an infalling observer never encounters a firewall before reaching the singularity.

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