Gravitational Collider Physics via Pulsar-Black Hole Binaries II: Fine and Hyperfine Structures are Favored

Understand

A rotating black hole can be clouded by light bosons via superradiance, and thus acquire an atom-like structure.

• If such a gravitational atom system is companioned with a pulsar, the pulsar can trigger transitions between energy levels of the gravitational atom, and these transitions can be detected by pulsar timing.
• We show that in such pulsar-black hole systems, fine and hyperfine structure transitions are more likely to be probed than the Bohr transition.
• Also, the calculation of these fine and hyperfine structure transitions are under better analytic control.