Universal approach to cosmological singularities in two-dimensional dilaton gravity

1994/04/18 by G. N. Martin, Gabriel N. Martin, F. D. Mazzitelli +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Quantum Electrodynamics and Casimir Effect #gr-qc

paper · pdf · doi:10.1103/physrevd.50.r613

published as Phys.Rev.D50:613-617,1994 · 12 pages (revtex)

arxiv created 1994/04/18 · openalex publication_date 1994/07/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show that in a large class of two-dimensional models with conformal matter fields, the semiclassical cosmological solutions have a weak coupling singularity if the classical matter content is below a certain threshold. This threshold and the approach to the singularity are model independent. When the matter fields are not conformally invariant, the singularity persists if the quantum state is the vacuum near the singularity, and could dissappear for other quantum states.

Citations

• The Endpoint of Hawking Evaporation
• Quantum Fields in Curved Space
• Cosmic Censorship in Two-Dimensional Gravity
• Universality and scaling in gravitational collapse of a massless scalar field