A toy model using four-dimensional Brill-Lindquist wormholes reproduces the Page curve for black hole evaporation and shows Hawking-radiation decoding complexity falls to polynomial at late times.
AdS plane waves and entanglement entropy
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abstract
AdS plane waves describe simple backgrounds which are dual to anisotropically excited systems with energy fluxes. Upon dimensional reduction, they reduce to hyperscaling violating spacetimes: in particular, the $AdS_5$ plane wave is known to exhibit logarithmic behavior of the entanglement entropy. In this paper, we carry out an extensive study of the holographic entanglement entropy for strip-shaped subsystems in AdS plane wave backgrounds. We find that the results depend crucially on whether the strip is parallel or orthogonal to the energy current. In the latter case, we show that there is a phenomenon analogous to a phase transition.
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Evaporating universes
A toy model using four-dimensional Brill-Lindquist wormholes reproduces the Page curve for black hole evaporation and shows Hawking-radiation decoding complexity falls to polynomial at late times.