Although black holes are primarily described by general relativity, they can also be studied from the perspective of quantum physics. This reveals a paradox: can information really disappear in a black hole, as general relativity says, or is it preserved in a way that we do not yet understand?
In an article published in La Recherche, Iosif Bena, a physicist at the IPhT, explains how string theory can reconcile the two hypotheses.
https://www.larecherche.fr/r%C3%A9soudre-le-paradoxe-de-linformation
You also can read this article in the last issue La Recherche n°581 april-june 2025.