Near-horizon quantum dynamics of 4D Einstein gravity from 2D Jackiw-Teitelboim gravity
Near-horizon quantum dynamics of 4D Einstein gravity from 2D Jackiw-Teitelboim gravity
We study quantum fluctuations in the light-cone metric of the 4D Einstein-Hilbert action via dimensional reduction to Jackiw-Teitelboim (JT) gravity. In particular, we show that, in Einstein gravity, the causal development of a region in flat Minkowski spacetime, near a horizon defined by light sheets, can be described by an …