Time-like extra dimension and cosmological constant in brane models

2000/09/30 by Tianjun Li · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #hep-ph #hep-th

paper · pdf · doi:10.1016/s0370-2693(01)00215-5

published as Phys.Lett. B503 (2001) 163-172 · Latex, 15 pages, version to appear in PLB

arxiv created 2001/02/04 · openalex publication_date 2001/03/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We discuss the general models with one time-like extra dimension and parallel 3-branes on the space-time M⁴ × M¹. We also construct the general brane models or networks with n space-like and m time-like extra dimensions and with constant bulk cosmological constant on the space-time M⁴× (M¹)^n+m, and point out that there exist two kinds of models with zero bulk cosmological constant: for static solutions, we have to introduce time-like and space-like extra dimensions, and for non-static solutions, we can obtain the models with only space-like extra dimension(s). In addition, we give two simplest models explicitly, and comment on the 4-dimensional effective cosmological constant.

Cited by

• Reconsidering extra time-like dimensions
• Modern cosmologies from empty Kaluza-Klein solutions in 5D
• A symmetry for vanishing cosmological constant in an extra-dimensional toy model