The dynamical evolution of 3-space in a higher dimensional steady state universe


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Akarsu O., Dereli T.

GENERAL RELATIVITY AND GRAVITATION, cilt.45, sa.5, ss.959-986, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 5
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1007/s10714-013-1505-1
  • Dergi Adı: GENERAL RELATIVITY AND GRAVITATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.959-986
  • Anahtar Kelimeler: Kaluza-Klein cosmology, Variable deceleration parameter, Accelerated expansion, COSMOLOGICAL CONSTANT, INFLATIONARY UNIVERSE, FLATNESS, HORIZON, LAMBDA
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

We investigate a class of cosmological solutions of Einstein's field equations in higher dimensions with a cosmological constant and an ideal fluid matter distribution as a source. We discuss the dynamical evolution of the universe subject to two constraints that (i) the total volume scale factor of the universe is constant and (ii) the effective energy density is constant. We obtain various interesting new dynamics for the external space that yield a time varying deceleration parameter including oscillating cases when the flat/curved external and curved/flat internal spaces are considered. We also comment on how the universe would be conceived by an observer in four dimensions who is unaware of the extra dimensions.