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A new solution of the Einstein-Born-Infeld theory in 2+1 space-time is derived. A new solution has no horizon there are two singularity. This space-time has two singular points, however, one of the point at the origin is not in the physical…

广义相对论与量子宇宙学 · 物理学 2014-02-14 Masashi Kuniyasu

We discuss general properties of the conservation law associated with a local symmetry. Using Noether's theorem and a generalized Belinfante symmetrization procedure in 3+1 dimensions, a symmetric energy-momentum (pseudo) tensor for the…

高能物理 - 理论 · 物理学 2014-11-18 Dongsu Bak , D. Cangemi , R. Jackiw

We study thermodynamics of cosmological models in the Horava-Lifshitz theory of gravity, and systematically investigate the evolution of the universe filled with a perfect fluid that has the equation of state $p=w\rho$, where $p$ and $\rho$…

高能物理 - 理论 · 物理学 2009-08-05 Anzhong Wang , Yumei Wu

We investigate the thermodynamics of rotating Lovelock-Lifshitz black branes. We calculate the conserved and thermodynamic quantities of the solutions and obtain a relation between temperature, angular velocity, energy density, entropy…

高能物理 - 理论 · 物理学 2011-10-11 M. H. Dehghani , Sh. Asnafi

It is shown that the differential form of Friedmann equations of FRW universe can be recast as a similar form of the first law, $T_{h}dS_{h} = dE + WdV$, of thermodynamics at the apparent horizon of FRW universe filled with the viscous…

广义相对论与量子宇宙学 · 物理学 2008-12-25 M. Akbar

Regarding a particular class of pure $F(R)$ gravity in three dimensions, we obtain an analytical rotating Lifshitz-like black hole solution. We first investigate some geometrical properties of the obtained solution that reduces to a charged…

高能物理 - 理论 · 物理学 2023-02-16 Kh. Jafarzade , E. Rezaei , S. H. Hendi

A possible source of black hole entropy could be the entanglement of quantum fields in and out the horizon. The entanglement entropy of the ground state obeys the area law. However, a correction term proportional to a fractional power of…

高能物理 - 理论 · 物理学 2011-08-22 Ahmad Sheykhi , Seyed Hossein Hendi

We develop a novel holographic dictionary for the thermodynamics of black holes with Lifshitz and hyperscaling violating asymptotics, generalizing the dictionary for Anti-de Sitter black holes. Using our dictionary we show that the…

高能物理 - 理论 · 物理学 2025-09-01 Wan Cong , David Kubizňák , Robert B. Mann , Manus R. Visser

Horizon thermodynamics is expected to be related to the effective energy based on the energy density calculated from the Friedmann equation for a Friedmann--Robertson--Walker (FRW) universe. In the present study, the effective energy and…

广义相对论与量子宇宙学 · 物理学 2023-08-07 Nobuyoshi Komatsu

We study the first law of thermodynamics in IR modified H\v{o}rava-Lifshitz spacetime. Based on the Bekenstein-Hawking entropy, we obtain the integral formula and the differential formula of the first law of thermodynamics for the…

广义相对论与量子宇宙学 · 物理学 2010-05-12 Mengjie Wang , Jiliang Jing , Chikun Ding , Songbai Chen

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

We present a general procedure to construct the first law of thermodynamics on the apparent horizon and illustrate its validity by examining it in some extended gravity theories. Applying this procedure, we can describe the thermodynamics…

高能物理 - 理论 · 物理学 2008-11-26 Shao-Feng Wu , Bin Wang , Guo-Hong Yang

The present work deals with three alternative generalized Bekenstein-Hawking formulation of thermodynamical parameters namely entropy and temperature for the universal thermodynamical system bounded by a horizon in the frame work of…

综合物理 · 物理学 2017-02-21 Subhajit Saha , Subenoy Chakraborty

The question that continues to hinge the interrelation between cosmology and thermodynamics is broadly described as -- what is the form of horizon entropy that links the Friedmann equations for a "$general$" gravity theory with the…

广义相对论与量子宇宙学 · 物理学 2024-01-30 Shin'ichi Nojiri , Sergei D. Odintsov , Tanmoy Paul , Soumitra SenGupta

We prove the Lieb-Schultz-Mattis (LSM) theorem on the energy spectrum of a general two or three-dimensional quantum many-body system with the U(1) particle number conservation and translation symmetry. Especially, it is demonstrated that…

强关联电子 · 物理学 2021-12-07 Yasuhiro Tada

In this paper we discuss thermodynamics of apparent horizon of an $n$-dimensional Friedmann-Robertson-Walker (FRW) universe embedded in an $(n+1)$-dimensional AdS spacetime. By using the method of unified first law, we give the explicit…

高能物理 - 理论 · 物理学 2008-11-26 Rong-Gen Cai , Li-Ming Cao

We consider Einstein gravities coupled to a cosmological constant and multiple $SU(2)$ Yang-Mills fields in general dimensions and find that the theories admit colored Lifshitz solutions with dynamic exponents $z>1$. We also introduce a…

高能物理 - 理论 · 物理学 2015-06-19 Xing-Hui Feng , Wei-Jian Geng

The holographic principle can lead to cosmological scenarios, i.e., holographic equipartition models. In this model, an extra driving term (corresponding to a time-varying cosmological term) in cosmological equations depends on an…

广义相对论与量子宇宙学 · 物理学 2019-02-25 Nobuyoshi Komatsu

We consider Einstein gravities coupled to a cosmological constant and $SU(2)$ Yang-Mills fields in four and five dimensions. We find that the theories admit colored Lifshitz solutions with dynamic exponents $z>1$. We study the wave…

高能物理 - 理论 · 物理学 2015-06-23 Zhong-Ying Fan , H. Lu

By refining the method proposed in arXiv:2010.07660, entropy current and entropy density for a relativistic hydrostatic equilibrium system with spherical symmetry are constructed as a non-Noether conserved charge in the Einstein gravity…

广义相对论与量子宇宙学 · 物理学 2024-07-12 Shuichi Yokoyama
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