Dilaton gravity and spacetimes with finite curvature away from the Hawking temperature

zbMATH Open0997.83058arXivhep-th/9911077MaRDI QIDQ1347581

O. B. Zaslavskii

Publication date: 18 November 2002

Published in: (Search for Journal in Brave)

Abstract: It is shown that static solutions with a finite curvature at the horizon may exist in dilaton gravity at temperatures $Teq{T}_H$ (including T=0) where $T_H$is the Hawking one. Hawking radiation is absent and the state of a system represents thermal excitation over the Boulware vacuum. The horizon remains unattainable for a observer because of thermal divergences in the stress-energy of quantum fields there. However, the curvature at the horizon is finite, when measured from outside, since these divergences are compensated by those in gradients of a dilaton field. Spacetimes under consideration are geodesically incomplete and the coupling between dilaton and gravity diverges at the horizon, so we have singularity without singularity.

Full work available at URL: https://arxiv.org/abs/hep-th/9911077

zbMATH Keywords

Hawking temperaturedilaton gravity

Mathematics Subject Classification ID

Black holes (83C57) Relativistic gravitational theories other than Einstein's, including asymmetric field theories (83D05)

Related Items (3)

Hawking radiation from dilaton gravity in 1 + 1 dimensions: a pedagogical review ⋮ The effective Tolman temperature in curved spacetimes ⋮ Spontaneous scalarization in (A)dS gravity at zero temperature

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