Insights and possible resolution to the information loss paradox via the tunneling picture

Understand

This paper investigates the information loss paradox in the WKB/tunneling picture of Hawking radiation.

• In the tunneling picture one can obtain the tunneling amplitude to all orders in $\hbar$.
• However all terms beyond the lowest, semi-classical term involve unknown constants.
• Despite this we find that one can still arrive at interesting restrictions on Hawking radiation to all orders in $\hbar$: (i) Taking into account only quantum corrections the spectrum remains thermal to all orders.