Black hole factory: a review of double-null formalism

Understand

In this review paper, we comprehensively summarize numerical applications of double-null formalism for studying dynamics within the theory of gravity.

• By using the double-null coordinates, we can investigate dynamical black holes and gravitational phenomena within spherical symmetry, including gravitational collapse, formation of horizons and singularities, as well as evaporations.
• This formalism can be extended to generic situations, where we can change dimensions, topologies, the gravity sector, as well as the matter sector.
• We also discuss its possible implications for black hole physics and particle astrophysics.