Fuzzballs and Observations

Understand

The advent of gravitational waves and black hole imaging has opened a new window into probing the horizon scale of black holes.

• An important question is whether string theory results for black holes can predict interesting and observable features that current and future experiments can probe.
• In this article I review the budding and exciting research being done on understanding the possibilities of observing signals from fuzzballs, where black holes are replaced by string-theoretic horizon-scale microstructure.
• In order to be accessible to both string theorists and black hole phenomenologists, I give a brief overview of the relevant observational experiments as well as the fuzzball paradigm in string theory and its explicitly constructable solutions called microstate geometries.