Modified Friedmann equations from DSR-GUP

Okcu O., Corda C., AYDINER E.

EPL, cilt.129, sa.5, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 129 Sayı: 5
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1209/0295-5075/129/50002
  • Dergi Adı: EPL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • İstanbul Üniversitesi Adresli: Evet

Özet

Considering the modified entropy-area relation from doubly special relativity-generalized uncertainity principle (DSR-GUP), we obtain the modified Friedmann equations from the first law of thermodynamics at apparent horizon. Due to the importance of GUP at Planck scale, we investigate the Friedmann equations and show the maximum energy density rho at Planck scale. Since GUP implies a minimal length, we find a minimum apparent horizon which has a potential to remove the Big Bang singularity. Furthermore, we analyse the effects of DSR-GUP on the deceleration parameter q for the equation of state p = omega rho and the flat case. Finally, we check the validity of the generalized second law (GSL) of thermodynamics and show that it is valid for all eras of the universe for any spatial curvature.