de Sitter JT gravity from double-scaled SYK
High Energy Physics - Theory
2025-09-03 v4
Abstract
It is known that the double-scaled SYK model (DSSYK) reduces to JT gravity with a negative cosmological constant by zooming in on the lower edge of the spectrum. We find that the de Sitter JT gravity (i.e. JT gravity with a positive cosmological constant) is reproduced from DSSYK by taking a scaling limit around the upper edge of the spectrum. We also argue that the appearance of de Sitter JT gravity is consistent with the behavior of the classical solution of the sine dilaton gravity.
Keywords
Cite
@article{arxiv.2505.08116,
title = {de Sitter JT gravity from double-scaled SYK},
author = {Kazumi Okuyama},
journal= {arXiv preprint arXiv:2505.08116},
year = {2025}
}
Comments
18 pages; v2: reference added; v3: to appear in JHEP; v4: published version