Quantum fluctuating geometries and the information paradox

Understand

We study Hawking radiation on the quantum space-time of a collapsing null shell.

• We use the geometric optics approximation as in Hawking's original papers to treat the radiation.
• The quantum space-time is constructed by superposing the classical geometries associated with collapsing shells with uncertainty in their position and mass.
• We show that there are departures from thermality in the radiation even though we are not considering back reaction.