2014/04/30 by Yong-Chang Huang, Huang, Yong-Chang, LiuJi Li +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #gr-qc #hep-th
paper · pdf · doi:10.48550/arxiv.1404.7676
8 pages, 1 figure
arxiv created 2014/04/30 · openalex publication_date 2014/04/30 · arxiv updated 2014/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider a general n dimensional manifold, which is a direct product manifold of M4 × Mn-4 representing our universe and extra spatial dimensions. From Einstein-Hilbert action of the manifold, we deduce effective 4 dimensional Fridemann equations. Matching it with the normal Fridemann equations with the cosmological constant, we give an expression of the cosmological constant, and the expression under different conditions are discussed. Also according to a deduced relation, we reveal a connection between Hubble parameter and extra dimensions. In this regard, we take into account all possible states of extra dimension which are consistent with current experimental result as well.