Abstract
We propose a three-dimensional counterpart for Jackiw–Teitelboim gravity coupled to a two-dimensional CFT bath based on partial reduction. Transverse brane fluctuations become the dilaton field, and the island and defect-extremal-surface entropies agree in the construction.
Context
耦合 bath 的 JT 引力是半经典黑洞蒸发的核心模型。其高维来源有助于澄清引力与场论扇区如何组合。
主要结果
缺陷 brane 的横向位移在部分约化后成为 dilaton，重现完整 JT 作用量，并给出与 defect extremal surface 计算一致的细粒化熵。
为何重要
它给出耦合 bath 的 JT 引力的洛伦兹高维实现，并明确两种熵处方之间的关系。
引用 / BibTeX
@article{Deng:2023JTPartialReduction,
author = {Deng, Feiyu and An, Yu-Sen and Zhou, Yang},
title = {JT gravity from partial reduction and defect extremal surface},
journal = {JHEP},
volume = {02},
pages = {219},
year = {2023},
doi = {10.1007/JHEP02(2023)219},
eprint = {2206.09609},
archivePrefix = {arXiv}
}