1995/09/27 by Jerome Martin, Jérôme Martin
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #gr-qc
paper · pdf · doi:10.1103/physrevd.52.6708
published as Phys.Rev. D52 (1995) 6708-6716 · 35 pages, latex, 2 figures available at [email protected], to appear in Physical Review D
arxiv created 1995/09/27 · openalex publication_date 1995/12/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cosmological perturbations on a manifold admitting signature change are studied. The background solution consists in a Friedmann-Lema\\itre-Robertson-Walker universe filled by a constant scalar field playing the role of a cosmological constant. It is shown that no regular solution exists satisfying the junction conditions at the surface of change. The comparison with similar studies in quantum cosmology is made. \textcopyright 1995 The American Physical Society.