Holography of Species in Cascading DGP

TL;DR

This paper extends the concept of species holography to Cascading DGP models, showing how certain scales in these theories can be understood as holographic scales, confirmed through effective field theory derivations.

Contribution

It generalizes species holography to Cascading DGP theories and identifies crossover and Vainshtein scales as holographic scales, supported by explicit derivations.

Findings

Crossover scales are holographic in Cascading DGP.

Vainshtein scales can be interpreted holographically.

Effective field theory confirms the holographic nature of these scales.

Abstract

In this paper we generalize the idea of species holography to the case of Cascading DGP theories. Essence of the phenomenon is that a 4D field theory with N particle species coupled to a high-dimensional bulk gravity propagating solely a graviton becomes strongly coupled at the scale that would be the quantum gravity scale of the bulk theory if all the species were propagating in the bulk. We will see that both, crossover scales and Vainshtein scales, can be understood as holographic scales in the above sense. We confirm our results by an explicit effective field theoretic derivation of these scales in Cascading DGP.