Speaker
Description
Hawking radiation is the most celebrated result of quantum field theory on a curved background. It completed the formulation of black hole thermodynamics and initiated the black hole information loss debate. Candidate theories of quantum gravity are required to demonstrate their way of entropy counting, indicate modifications to gravitational collapse, and take a stance on the issue of information loss and/or its resolution. At the same time, the pre-conditions for formulation of the paradox are often neither fully specified nor explored. We review the necessary semiclassical ingredients of the formulation of the paradox, and describe how assuming them constrains properties of black holes. Even under these conditions it is unclear if the paradox can be formulated. What is clear is that black holes must be more exotic than exotic horizonless objects, as they violate all the assumptions of the Buchdahl theorem.
