Thermodynamics of scale-dependent Friedmann equations

نویسندگان

چکیده

Abstract In this work, the role of a time-varying Newton constant under scale-dependent approach is investigated in thermodynamics Friedman equations. particular, we show that extended equations can be derived either from equilibrium when non-matter energy momentum tensor interpreted as fluid or non-equilibrium an entropy production term, which depends on constant, included. Finally, comparison between black hole and cosmological framework gravity briefly discussed.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

First Law of Thermodynamics and Friedmann Equations of Friedmann-Robertson-Walker Universe

Applying the first law of thermodynamics to the apparent horizon of a FriedmannRobertson-Walker universe and assuming the geometric entropy given by a quarter of the apparent horizon area, we derive the Friedmann equations describing the dynamics of the universe with any spatial curvature. Using entropy formulae for the static spherically symmetric black hole horizons in Gauss-Bonnet gravity an...

متن کامل

Covariant Thermodynamics and " Realistic " Friedmann Model

We discuss a cosmological Friedmann model modified by inclusion of off-shell matter which has an equation of state p, ρ ∝ T 5 , p = 1/4ρ. Such matter is shown to have energy density comparable with that of non-interacting radiation at temperatures of the order of the Hagedorn temperature, ∼ 10 12 K, indicating the possibility of a phase transition. It is argued that the T 5-phase, or an admixtu...

متن کامل

On asymptotic solutions of Friedmann equations

Our main aim is to apply the theory of regularly varying functions to the asymptotical analysis at infinity of solutions of Friedmann cosmological equations. A new constant C is introduced related to the Friedmann cosmological equations. Determining the values of C we obtain the asymptotical behavior of the solutions, i.e. of the expansion scale factor aðtÞ of a universe. The instance C < 4 is ...

متن کامل

Thermodynamics of Friedmann Equation and Masslike Function in General Braneworld

Using the generalized procedure proposed by Wu et al23 recently, we construct the first law of thermodynamics on apparent horizon in a general braneworld model with curvature correction terms on the brane and in the bulk, respectively. The explicit entropy formulary of apparent horizon in the general braneworld is worked out. We also discuss the masslike function which associated with a new typ...

متن کامل

Friedmann Equations of FRW Universe in Scalar - tensor Gravity , f ( R ) Gravity and First Law of Thermodynamics

In the paper, hep-th/0501055 (R. it is shown that by applying the first law of thermodynamics to the apparent horizon of an FRW universe and assuming the geometric entropy given by a quarter of the apparent horizon area, one can derive the Friedmann equations describing the dynamics of the universe with any spatial curvature; using the entropy formula for the static spherically symmetric black ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: European Physical Journal C

سال: 2021

ISSN: ['1434-6044', '1434-6052']

DOI: https://doi.org/10.1140/epjc/s10052-021-09274-7