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Clocks and Rods in Jackiw-Teitelboim Quantum Gravity
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Clocks and Rods in Jackiw-Teitelboim Quantum Gravity
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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. Due to quantum effects, at distances of order the Planck length to the horizon, a dramatic breakdown of Rindler geometry is observed.
Forward citations
Cited by 9 Pith papers
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Relational path integral, effective actions and quantum frame covariance in gravity
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Coupling a worldline observer to JT gravity replaces its evolution operator by an exactly computed average over fluctuating Euclidean times; the fluctuations are small in the disk but large on the double trumpet.
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Exact Schwarzian Metric Factor and Holographic Wilson-Loop Screening
Exact Schwarzian averaging yields a completely monotone metric factor with no confining minimum, so the Wilson-loop potential screens as E(L) ~ -κ_IR/L² rather than confining.
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Probabilistic Causality from Graviton Fluctuations
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Probabilistic Causality from Graviton Fluctuations
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Gravitational dressing in JT gravity lets an infalling Unruh-DeWitt detector detect the horizon location and temperature locally, violating the equivalence principle without a firewall.
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A review of the chaos-assisted holographic correspondence linking the SYK model to 2D JT gravity, including the need for string theory corrections at fine quantum scales.
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