Long-range forces between nonidentical black holes with non-BPS extremal limits

Article Physics, Particles & Fields

Repulsive black holes and higher-derivatives

Sera Cremonini et al.

Summary: This paper investigates the long-range force between zero-temperature black holes in two-derivative theories of gravity coupled to matter. It is found that the presence of massless scalar fields and four-derivative corrections can break the no-force condition for these black holes. By calculating the higher-derivative corrections to the scalar charges, it is determined that the higher-derivative corrected black holes can be either self-attractive or self-repulsive, depending on the values of the Wilson coefficients and scalar moduli VEVs.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

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Article Astronomy & Astrophysics

A comment on no-force conditions for black holes and branes

Thomas Van Riet

Summary: In the context of the weak gravity conjecture, the notion of quasi-extremality for black holes and branes is recently defined as having either vanishing horizon size or surface gravity. This simplified derivation is essentially present in the formalism of timelike reduction pioneered by Breitenlohner, Gibbons, and Maison. The formalism also provides a natural definition of quasi-extremality for gravitational instantons and strengthens the argument that macroscopic axion wormholes do not contribute in the path integral since they are self-repulsive in a Euclidean sense.

CLASSICAL AND QUANTUM GRAVITY (2021)

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Article Physics, Particles & Fields