Revealing the interior of black holes out of equilibrium in the SYK model

Understand

The Sachdev-Ye-Kitaev (SYK) model can be used to describe black holes (BHs) in two-dimensional nearly-anti-de-Sitter gravity.

• We show that when such BHs are perturbed by a time-dependent negative-energy perturbation, their interior can be partially revealed.
• In the SYK model, a partial measurement of the state of the Majorana fermion pairs allows one to construct a matching time-dependent negative-energy perturbation of the BH geometry that shifts the state of the BH away from its equilibrium state.
• Kourkoulou and Maldacena showed that, if the perturbation is strong enough, the interior can be fully exposed and the BH disappears.