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We present an analytical formulation of the recent one-shot decoupling modelof Br\`adler and Adami [arXiv:1505.0284] and compute the resulting "PageInformation" curves, for the reduced density matrices for the evaporating blackhole internal degrees of freedom, and emitted Hawking radiation pairs entangledacross the horizon. We argue that black hole evaporation/particle productionhas a very close analogy to the laboratory process of spontaneous parametricdown conversion, when the pump is allowed to deplete.

Spontaneous parametric down conversion with a depleted pump as an analogue for black hole evaporation/particle production