  In the context of Type-IIA String Theory compactified to four dimensions on a
Calabi-Yau manifold (CY), we study the effect of considering perturbative and
non-perturbative corrections (in alpha prime) to the prepotential of the
resulting effective Supergravity theory on the space of black hole solutions.
Considering the large volume limit of the CY, in which the non-perturbative
corrections are exponentially suppressed, we define a new class of solutions
which turn out to be genuinely quantum, in the sense that not only their
classical limit is not well defined, but also the truncation under
consideration becomes inconsistent in such a limit. Next, we construct the
first non-extremal black hole solution with non-constant scalars in the
presence of perturbative corrections. Right after, restricting ourselves to the
case of self-mirror CY, we study the case in which the sub-dominant
contribution has a non-perturbative origin, obtaining the first family of
explicit supersymmetric solutions of this kind. Surprisingly enough, these
solutions turn out to involve multivalued functions, which opens the door for a
possible violation of the No-Hair conjecture. We discuss how this cannot be
accomplished in our String Theory set up, but how the possibility remains open
in the context of N=2, d=4 ungauged Supergravity.
  Fully in Spanish.
