|
FIZIKA B 19 (2010) 4 , 233-238
 
LETTER TO THE EDITOR
ACCELERATED EXPANSION OF THE HIGHER-DIMENSIONAL SPATIALLY FLAT UNIVERSE
R. A. EL-NABULSI
College of Mathematics and Information Science, Qujing
Normal University, Qujing, Yunnan 655011, PR China
E-mail address: nabulsiahmadrami@yahoo.fr
Received 31 March 2009; Revised manuscript received 28 July 2010
Accepted 15 December 2010 Online 6 April 2011
We discuss in this work two independent scenarios of a
higher-dimensional spatially flat universe. In the 1st
scenario, we conjecture that the cosmological constant varies
according to the ansatzs Λ = ρα,
α R, where ρ is the energy density assumed
to vary like ρ = DHm, (D,m) R. In the
2nd scenario, we conjecture that the cosmological
constant varies like Λ = Gβ, β R,
where G is the gravitational coupling constant. Both
scenarios reveal many interesting and appealing consequences
which are discussed in some details.
PACS numbers: 04.50.+h, 11.25.Yb, 98.80.Es, 95.36.+x
UDC 524.83
Keywords: higher-dimensional cosmology, dark energy, accelerated expansion
|
