Abstract
We specify bulk coordinates in Jackiw-Teitelboim (JT) gravity using a boundary-intrinsic radar definition. This allows us to study and calculate exactly diff-invariant bulk correlation functions of matter-coupled JT gravity, which are found to satisfy microcausality. We observe that quantum gravity effects dominate near-horizon matter correlation functions. This shows that quantum matter in classical curved spacetime is not a sensible model for near-horizon matter-coupled JT gravity. This is how JT gravity, given our choice of bulk frame, evades an information paradox. This echoes into the quantum expectation value of the near-horizon metric, whose analysis is extended from the disk model to the recently proposed topological completion of JT gravity [1]. Due to quantum effects, at distances of order the Planck length to the horizon, a dramatic breakdown of Rindler geometry is observed.
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Blommaert, A., Mertens, T.G. & Verschelde, H. Clocks and rods in Jackiw-Teitelboim quantum gravity. J. High Energ. Phys. 2019, 60 (2019). https://doi.org/10.1007/JHEP09(2019)060
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DOI: https://doi.org/10.1007/JHEP09(2019)060