Ephemeral islands, plunging quantum extremal surfaces and BCFT channels
Ephemeral islands, plunging quantum extremal surfaces and BCFT channels
A bstract We consider entanglement entropies of finite spatial intervals in Minkowski radiation baths coupled to the eternal black hole in JT gravity, and the related problem involving free fermion BCFT in the thermofield double state. We show that the non-monotonic entropy evolution in the black hole problem precisely matches …