  It has been recently proposed that quantum black holes can be described as
N-graviton Bose-Einstein condensates. In this picture the quantum properties of
BHs "... can be understood in terms of the single number N". However, so far,
the dynamical origin of the occupational number N has not been specified. This
description is alternative to the usual one, where black holes are believed to
be well described geometrically even at the quantum level. In this paper we
pursue the former point of view and develop a non-geometrical dynamical model
of quantum black holes (BHs). In our model the occupational number N is
proportional to the principal quantum number n of a Planckian harmonic
oscillator. The so-called "classicalization" corresponds to the large-n limit,
where the Schwarzschild horizon is recovered.
