Higher spin swampland conjecture for massive AdS$_{3}$ gravity

TL;DR

This paper proposes a version of the swampland weak gravity conjecture for higher spin massive gravity in AdS$_{3}$, relating mass, charge, and coupling constants with specific formulas, to explore consistency conditions in quantum gravity theories.

Contribution

It formulates a new higher spin swampland conjecture for massive AdS$_{3}$ gravity, expressing bounds involving mass, charge, and coupling constants in a precise mathematical framework.

Findings

Derived a bound: $M_{hs} \,\leq\, \sqrt{2} Q_{hs} g_{hs} M_{Pl}$.

Expressed higher spin charge as $Q_{hs}^{2} = s(s-1)$.

Defined the coupling constant as $g_{hs}^{2} = 2/(M_{Pl}^{2} l_{AdS_{3}}^{2})$.

Abstract

In this paper, we show that a possible version of the swampland weak gravity conjecture for higher spin (HS) massive topological AdS$_{3}$ gravity can be expressed in terms of mass $M_{hs}$, charge $Q_{hs}$ and coupling constant $g_{hs}$ of 3D gravity coupled to higher spin fields as $M_{hs} \leq \sqrt{2}$ $Q_{hs}$ $g_{hs}$ $M_{Pl}$. The higher spin charge is given by the $SO(1,2)$ quadratic Casimir $Q_{hs}^{2}=s\left (s-1\right) $ and the HS coupling constant by ${\large g}_{hs} ^{2}=2/\left (M_{Pl}^{2} l_{AdS_{3}}^{2}\right )$ while the mass expressed like $\left( l_{AdS_{3}} \text{M}_{hs}\right) ^{2}$ is defined as $ \left (1+\mu l_{AdS_{3}} \right ) ^{2} s \left ( s-1 \right ) +[1- \left ( \mu l_{AdS_{3}} \right ) ^{2} \left ( s-1 \right ) ]$.