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Résumé |
Black holes are known to behave as thermodynamic systems, with a temperature and
an entropy. In string theory, the origin of the black-hole entropy is explained
from the multitude of ways the non-perturbative degrees of freedom (the D-branes)
can interact when gravity is turned off. But what happens when gravity is turned
back on?
In this talk, I will review the hypothesis that individual black-hole microstates
may not have a horizon and differ from the classical black-hole solution at the
horizon scale. I will explain the in and outs of this paradigm, including its
relation with respect to the black-hole information paradox. I will also explain
the physics played by D-brane interactions in the internal dimensions.
Finally, if time permits, I will explain how one could perhaps test the validity
of this horizonless property of individual microstates through their collective
behaviours, in particular quantum chaos.
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