Tunneling into fuzzball states

Understand

String theory suggests that black hole microstates are quantum, horizon sized `fuzzballs', rather than smooth geometries with horizon.

• Radiation from fuzzballs can carry information and does not lead to information loss.
• But if we let a shell of matter collapse then it creates a horizon, and it seems that subsequent radiation will lead to information loss.
• We argue that the resolution to this problem is that the shell can tunnel to the fuzzball configurations.