3 papers
hep-th2025
Finite Bulk Hilbert Space in ETH Matrix Model for double-scaled SYK
Masamichi Miyaji, Soichiro Mori, Kazumi Okuyama
We extend the notion of chord number in the strict large double-scaled Sachdev-Ye-Kitaev (DSSYK) model to the corresponding finite ETH matrix model. The chord number in the…
hep-th2025
de Sitter JT gravity from double-scaled SYK
Kazumi Okuyama
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 t…
hep-th2023
Negativity and its capacity in JT gravity
Kazumi Okuyama, Takeshi Tachibana
We study the refined Rényi negativity in the matrix model of Jackiw-Teitelboim (JT) gravity. We first consider the JT gravity with dynamical branes, which serves as a toy model of…