Validity of semiclassical bulk intuition and AdS/CFT at exponentially late times

Ascertain whether semiclassical bulk intuition and even the AdS/CFT correspondence remain valid at timescales t ~ exp(O(S_BU)), given that boundary time evolution induces only exponentially suppressed dynamics on baby-universe degrees of freedom in the random-encoding picture.

Background

In the authors’ model, logical baby-universe degrees of freedom are not reconstructable on either boundary, implying that boundary time evolution does not generate ordinary dynamics within the baby-universe sector except on exponentially long timescales set by the baby-universe entropy.

They emphasize that beyond such times it is uncertain whether usual semiclassical or even holographic reasoning should apply, highlighting a regime where the standard correspondence may break down.