Details

Autor(en) / Beteiligte

• Joung, Euihun
• Narayan, Prithvi
• Yoon, Junggi

Titel

Gravitational edge mode in asymptotically AdS2: JT gravity revisited

Ist Teil von

• The journal of high energy physics, 2024-05, Vol.2024 (5), p.244-32, Article 244

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2024

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• A bstract We study the gravitational edge mode of the Jackiw-Teitelboim (JT) gravity and its sl (2, ℝ ) BF theory description with the asymptotic AdS 2 boundary condition. We revisit the derivation of the Schwarzian theory from the wiggling boundary as an action for the gravitational edge mode. We present an alternative description for the gravitational edge mode from the metric fluctuation with the fixed boundary, which is often referred as “would-be gauge mode”. We clarify the relation between the wiggling boundary and the would-be gauge mode. We demonstrate a natural top-down derivation of PSL(2, ℝ ) gauging and the path integral measure of the Schwarzian theory. In the sl (2, ℝ ) BF theory, we incorporate the gravitational edge mode and derive the Schwarzian theory with PSL(2, ℝ ) gauging. We also discuss the path integral measure from the Haar measure in the Iwasawa decomposition of PSL(2, ℝ ).