Low-energy brane decoupling in AdS flux vacua
Abstract
We study the decoupling of branes sourcing AdS flux vacua from the asymptotic bulk using scalar-wave absorption probabilities. In a one-modulus truncation, the result depends only on the dimension of the AdS vacuum and on the asymptotic steepness of the scalar potential. We find that for any steepness and for any dimension greater than two the absorption probability vanishes in the low-energy limit, showing that the branes decouple from the bulk. We illustrate the general analysis in several scale-separated AdS vacua. For DGKT we find Pabs∼ω27/7 and an effective transverse dimension deff=20/7. Interestingly, the scalar potential along the brane-induced moduli trajectory agrees with that obtained by compactifying a hypothetical (4+13/7)-dimensional gravity theory on a 13/7-dimensional sphere threaded by flux. We also apply the analysis to scale-separated AdS3 examples and to the simplest one-modulus KKLT model.
Related
- Control Problem of de Sitter Vacua with T-brane Uplift
- Phases of flux vacua and their quantum symmetries
- Note on arithmetic structure of modulus vacua in flux compactifications
- Note on arithmetic structure of modulus vacua in flux compactifications
- Flux Vacua, Asymptotic Periods, and Relatively Anosov Representations
BibTeX
@misc{apers2026lowenergy,
title = {{Low-energy brane decoupling in AdS flux vacua}},
author = {Fien Apers and Noelia Sánchez González},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.17342},
eprint = {2609.17342},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.17342},
}
RIS
TY - UNPB
TI - Low-energy brane decoupling in AdS flux vacua
AU - Fien Apers
AU - Noelia Sánchez González
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.17342
UR - https://arxiv.org/abs/2609.17342
AB - We study the decoupling of branes sourcing AdS flux vacua from the asymptotic bulk using scalar-wave absorption probabilities. In a one-modulus truncation, the result depends only on the dimension of the AdS vacuum and on the asymptotic steepness of the scalar potential. We find that for any steepness and for any dimension greater than two the absorption probability vanishes in the low-energy limit, showing that the branes decouple from the bulk. We illustrate the general analysis in several scale-separated AdS vacua. For DGKT we find P_abs∼ω^27/7 and an effective transverse dimension d_eff=20/7. Interestingly, the scalar potential along the brane-induced moduli trajectory agrees with that obtained by compactifying a hypothetical (4+13/7)-dimensional gravity theory on a 13/7-dimensional sphere threaded by flux. We also apply the analysis to scale-separated AdS_3 examples and to the simplest one-modulus KKLT model.
ER -