  Abstract Black hole collision produce gravitational radiation which is
generally thought in a quantum limit to be gravitons. The stretched horizon of
a black hole contains quantum information, or a form of quantum hair, which in
a coalescence of black holes participates in the generation of gravitons. This
may be facilitated with a Bohr-like approach to black hole (BH) quantum physics
with quasi-normal mode (QNM) approach to BH quantum mechanics. Quantum gravity
and quantum hair on event horizons is excited to higher energy in BH
coalescence. The near horizon condition for two BHs right before collision is a
deformed AdS spacetime. These excited states of BH quantum hair then relax with
the production of gravitons. This is then argued to define RT entropy given by
quantum hair on the horizons. These qubits of information from a BH coalescence
should then appear in gravitational wave (GW) data. This is a form of the
standard AdS/CFT correspondence and the Ryu-Takayanagi (RT) formula.
