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相关论文: Thermodynamic of the $f(Q)$ universe

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By applying the unified first law of thermodynamics on the apparent horizon of FRW universe, we get the entropy relation for the apparent horizon in quasi-topological gravity theory. Throughout the paper, the results of considering the…

广义相对论与量子宇宙学 · 物理学 2016-05-17 H. Moradpour , R. Dehghani

In the present paper, we study the thermodynamics behavior of the field equations for the generalized f(T) gravity with an arbitrary coupling between matter and the torsion scalar. In this regard, we explore the verification of the first…

广义相对论与量子宇宙学 · 物理学 2017-01-17 Tahereh Azizi , Najibeh Borhani

We study the irreversible (non-equilibrium) thermodynamics of FRW universe containing only dark energy. Using the modified entropy-area relation which is motivated from the loop quantum gravity, we calculate the entropy-corrected form of…

广义相对论与量子宇宙学 · 物理学 2010-09-14 K. Karami , Mubasher Jamil , N. Sahraei

We explore thermodynamics of the apparent horizon in $f(T)$ gravity with both equilibrium and non-equilibrium descriptions. We find the same dual equilibrium/non-equilibrium formulation for $f(T)$ as for $f(R)$ gravity. In particular, we…

广义相对论与量子宇宙学 · 物理学 2015-05-30 Kazuharu Bamba , Chao-Qiang Geng

We investigate the Friedmann-Robertson-Walker (FRW) universe (containing dark energy) as a non-equilibrium (irreversible) thermodynamical system by considering the power-law correction to the horizon entropy. By taking power-law entropy…

综合物理 · 物理学 2011-12-14 M. Umar Farooq , Mubasher Jamil

With the usual definitions for the entropy and the temperature associated with the apparent horizon, we show that the unified first law on the apparent horizon is equivalent to the Friedmann equation for the scalar--tensor theory with…

广义相对论与量子宇宙学 · 物理学 2015-07-31 Yumei Huang , Yungui Gong , Dicong Liang , Zhu Yi

Starting from the first law of thermodynamics, $dE=T_hdS_h+WdV$, at apparent horizon of a FRW universe, and assuming that the associated entropy with apparent horizon has a quantum corrected relation, $S=\frac{A}{4G}-\alpha \ln…

高能物理 - 理论 · 物理学 2011-02-09 Ahmad Sheykhi

In this paper, we study thermodynamical properties of the apparent horizon in a universe governed by quasi-topological gravity. Our aim is twofold. First, by using the variational method we derive the general form of Friedmann equation in…

高能物理 - 理论 · 物理学 2015-06-16 M. H. Dehghani , A. Sheykhi , R. Dehghani

This paper explores the non-equilibrium behavior of thermodynamics at the apparent horizon of isotropic and homogeneous universe model in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet invariant and trace of…

广义相对论与量子宇宙学 · 物理学 2018-03-13 M. Sharif , Ayesha Ikram

In this paper we discuss the thermodynamics of the apparent horizon in $F(R)$ Ho\v{r}ava-Lifshitz gravity in equilibrium and non-equilibrium ensembles. We show that the second law of thermodynamics can be satisfied in this non relativistic…

广义相对论与量子宇宙学 · 物理学 2016-02-22 Abdul Jawad , Shamaila Rani , Davood Momeni , Faiza Gulshan , Ratbay Myrzakulov

We investigate thermodynamics of the apparent horizon in $f(R)$ gravity in the Palatini formalism with non-equilibrium and equilibrium descriptions. We demonstrate that it is more transparent to understand the horizon entropy in the…

广义相对论与量子宇宙学 · 物理学 2014-11-21 Kazuharu Bamba , Chao-Qiang Geng

We derive the modified Friedmann equation corresponding to the power-law corrected entropy-area relation $S_{\rm A}=\frac{A}{4}[1-K_{\alpha} A^{1-\frac{\alpha}{2}}]$ which is motivated by the entanglement of quantum fields in and out of the…

综合物理 · 物理学 2011-09-07 K. Karami , A. Abdolmaleki , N. Sahraei , S. Ghaffari

Late-time cosmic acceleration has motivated the exploration of various extensions of general relativity, among which $f(Q,\mathcal{T})$ gravity, based on the non-metricity scalar $Q$ and the trace of the energy--momentum tensor…

广义相对论与量子宇宙学 · 物理学 2026-04-29 Anirudh Pradhan , A. Husain , M. Zeyauddin , S. H. Shekh

This paper is devoted to study the generalized second law of thermodynamics in $f(T)$ gravity. We use quantum corrections such as power-law and logarithmic corrected entropies to the horizon entropy along with Gibbs' equation in the thermal…

广义相对论与量子宇宙学 · 物理学 2014-12-17 M. Sharif , Shamaila Rani

Adopting the thermodynamics-gravity conjecture, and assuming the entropy associated with the apparent horizon of the Friedmann-Robertson-Walker (FRW) universe has the form of the generalized Kaniadakis entropy, we extract the modified…

广义相对论与量子宇宙学 · 物理学 2024-02-20 Ahmad Sheykhi

We investigate the laws of thermodynamics in an accelerating universe driven by dark energy with a time-dependent equation of state. In the case we consider that the physically relevant part of the Universe is that envelopped by the…

广义相对论与量子宇宙学 · 物理学 2009-11-11 Bin Wang , Yungui Gong , Elcio Abdalla

We disclose the thermodynamical properties of the apparent horizon in a nonsingular universe. We take into account the zero-point length correction to the gravitational potential and derive the modified entropy expression that includes…

广义相对论与量子宇宙学 · 物理学 2025-05-06 Ahmad Sheykhi , Leila Liravi , Kimet Jusufi

The Friedmann equations of general relativity can be derived from the first law of thermodynamics when the entropy of the apparent horizon of a spatially isotropic universe is given by the Bekenstein-Hawking entropy. We point out that if…

广义相对论与量子宇宙学 · 物理学 2009-11-19 James E. Lidsey

We investigate the thermodynamical properties of the apparent horizon in a fractal universe. We find that one can always rewrite the Friedmann equation of the fractal universe in the form of the entropy balance relation $ \delta Q=T_h…

综合物理 · 物理学 2015-06-12 Ahmad Sheykhi , Zeinab Teimoori , Bin Wang

We investigate the thermodynamics at the apparent horizon of the FRW universe in $f(R,T)$ theory under non-equilibrium description. The laws of thermodynamics have been discussed for two particular models of $f(R,T)$ theory. The first law…

广义相对论与量子宇宙学 · 物理学 2014-09-26 M. Sharif , M. Zubair
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