30 اردیبهشت 1403

شایسته غفاری شویشه

مرتبه علمی: استادیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک - اخترفیزیک و کیهانشناسی
تلفن:
دانشکده: مرکز تحقیقات نجوم و اختر فیزیک مراغه

مشخصات پژوهش

عنوان
Note on agegraphic dark energy inspired by modified Barrow entropy
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Barrow entropy; agegraphic dark energy; acceleration.
سال
2023
مجله Physics of the Dark Universe
شناسه DOI 10.1016/j.dark.2023.101241
پژوهشگران احمد شیخی ، شایسته غفاری شویشه

چکیده

We revisit agegraphic dark energy (ADE) model when the entropy associated with the apparent horizon is in the form of Barrow entropy, S∼A^(1+δ/2), where 0≤ δ ≤ 1 indicates the amount of the quantum-gravitational deformation effects of the horizon. The modification to the entropy expression, not only change the energy density of ADE, but also modifies the Friedmann equations due to the thermodynamics-gravity conjecture. Based on this, we investigate the cosmological consequences of ADE through modified Barrow cosmology and disclose the effects of Barrow exponent δ on the evolutions of the cosmological parameters. We observe that, depending on the values of δ, the transition from early decelerated phase to the late time accelerated phase occurs, and the equation of state (EoS) parameter wde varies from quintessence −1 < wde<−1/3 to the phantom regime (wde <−1). Whenδ = 0, all results of ADE in standard cosmology are restored.