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Evanescent Black Holes
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abstract
A renormalizable theory of quantum gravity coupled to a dilaton and conformal matter in two space-time dimensions is analyzed. The theory is shown to be exactly solvable classically. Included among the exact classical solutions are configurations describing the formation of a black hole by collapsing matter. The problem of Hawking radiation and backreaction of the metric is analyzed to leading order in a $1/N$ expansion, where $N$ is the number of matter fields. The results suggest that the collapsing matter radiates away all of its energy before an event horizon has a chance to form, and black holes thereby disappear from the quantum mechanical spectrum. It is argued that the matter asymptotically approaches a zero-energy ``bound state'' which can carry global quantum numbers and that a unitary $S$-matrix including such states should exist.
Forward citations
Cited by 17 Pith papers
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All $2D$ generalised dilaton theories from $d\geq 4$ gravities
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Establishes holography of information in the CGHS model via asymptotic algebras and argues that islands violate commutativity of left- and right-boundary algebras.
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In the Unruh–de Sitter state the anomaly flux J=(N/48π)(κ_b²−κ_c²) is positive throughout the static patch, so every neutral SdS black hole evaporates monotonically and only the Nariai limit has zero flux.
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Anomaly-driven evaporation endpoints of a two-dimensional regular black hole
The FFN dilaton-coupled anomaly model applied to the 2D Bardeen-like black hole enforces r_∞=√2 ℓ for quiescent finite-radius branches and excludes most null branches except the borderline p=2 power-law case under str...
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First Law for Nonsingular Black Holes in 2D Dilaton Gravity
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Cauchy-horizon flux coefficients in the reduced Polyakov model
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Modified theories of gravity at different curvature scales
A review that classifies modified gravity theories by the GR principles they preserve or violate, and maps their tests onto a curvature-compactness plane.
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Hilbert Bundles and Holographic Space-time: the Hydrodynamic Approach to Gravity
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