Cosmic acceleration in f(Q) gravity: a nonlinear equation of state approach
European Physical Journal C, cilt.86, sa.2, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 86 Sayı: 2
- Basım Tarihi: 2026
- Doi Numarası: 10.1140/epjc/s10052-026-15310-1
- Dergi Adı: European Physical Journal C
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
- İstanbul Üniversitesi Adresli: Evet
Özet
We investigate late-time cosmic acceleration within the framework of f(Q) gravity supplemented by a phenomenological nonlinear equation of state of the form p=Aρ-Bρ. Adopting a power-law ansatz f(Q)=γ,(Q/Q0)n, we derive analytic expressions for the energy density and Hubble function and confront the model with a combined dataset consisting of CC, SNIa, BAO, quasar, and GRB observations covering 0.106