Original scientific paper

Accelerated expansion of a closed universe

Rami Ahmad El-Nabulsi ; Department of Nuclear and Energy Engineering, Cheju National University, Ara-Dong 1, Jeju 690-756, South Korea

Abstract

A novel formulation of an accelerated expansion of a closed universe in which the cosmological constant decays like Λ = (β/t)(˙a/a), where β is a positive parameter and a(t) is the scale factor, is presented and discussed in some details. The phenomenological decaying law is motivated from the fractional action-like variational approach (or fractionally differentiated Lagrangian function (FDLF)) recently introduced by the author.

Keywords

FDLF; accelerated expansion; decaying cosmological constant; increasing gravitational constant; bulk viscous stress

Hrčak ID:

304469

URI

https://hrcak.srce.hr/304469

Publication date:

1.7.2007.

Article data in other languages: croatian

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