Time: 10:00-11:30 2024/06/20

Location: Room N106, Teaching building  

Speaker: Xuyao Hu (Institute for Advanced Study, Tsinghua University)

Abstract:

The relationship between the Sachdev-Ye-Kitaev (SYK) model at low energies and two-dimensional dilaton gravity has been extensively discussed, yielding significant insights into quantum gravity in recent years. By considering a slightly more complicated limit, the double-scaled Sachdev-Ye-Kitaev (DSSYK) model offers even deeper insights into emergent gravity, extending beyond the IR regime. 

In this talk, we will begin with a brief overview of DSSYK. Based on recent work 2403.18333, we will then focus on a simplified model that captures the high-temperature limit of DSSYK. We will discuss the properties of the emergent geometry, including its dynamics in response to the insertion of matter particles, and the effective bulk metric and dilaton gravity reconstructed from geodesic lengths. Finally, we will conclude with comments on recent works relating DSSYK to sine-dilaton gravity and de Sitter space.