Conceptual

The Black Hole Waterfall Model of Unitary Black Hole Evaporation

A unitary phenomenological model in which an evaporating black hole is the depleting pump of a fully quantized spontaneous parametric down-conversion process, with interior idler partner particles cascading as further pump sources (the waterfall) to transport energy to the exterior Hawking radiation, producing a Page curve that returns to zero entropy at complete evaporation with no remnant.