English

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 E=E0E=-E_0 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 E=E0E=E_0 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

R2 v1 2026-06-28T23:30:39.761Z