A study of Universal thermodynamics in Lanczos–Lovelock gravity

Mitra, Saugata; Saha, Subhajit; Chakraborty, Subenoy

doi:10.1007/s10714-015-1913-5

Cited by 10 publications

(14 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the projection of the pure matter energy supply Aψ m along the apparent horizon gives the heat flow δQ in the Clausius relation δQ = T dS, so from the above equation (42) we obtain [32][33][34][35][36][37][38][39][40]…”

Section: Universal Thermodynamics In Rastall Theory Of Gravitymentioning

confidence: 99%

Cosmological consequences in the framework of generalized Rastall theory of gravity

Das¹,

Dutta²,

Chakraborty³

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

The paper deals with generalized Rastall theory of gravity and its cosmological consequences in the background of homogeneous and isotropic flat FLRW model with perfect fluid as the matter context. The model shows a non singular era (emergent scenario) at the early phase of expansion for a particular choice of the Rastall parameter. Also the model finds to be equivalent to the particle creation mechanism in Einstein gravity in the framework of non-equilibrium thermodynamics. Universal thermodynamics is briefly presented and it is found that the entropy function in Rastall theory is the usual Bekenstein entropy and there is no correction to it. Finally, a complete cosmic history starting from inflation to late time acceleration is presented for suitable choices of the Rastall parameter.

show abstract

Section: Universal Thermodynamics In Rastall Theory Of Gravitymentioning

confidence: 99%

Cosmological consequences in the framework of generalized Rastall theory of gravity

Das¹,

Dutta²,

Chakraborty³

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Finally, based on approach [51], it seems that their proposal for the apparent horizon entropy is independent of any interaction between the cosmos sectors. It is also worthy to note that the mutual interaction between the geometrical (T e µν ) and non-geometrical (T m µν ) sectors of cosmos in various modified theories of gravity, affect the apparent horizon entropy [33][34][35][36]. In fact, depending on the scales, it is such a curvature fluid which may play the role of dark energy.…”

Section: A Non-interacting Casementioning

confidence: 99%

“…give a positive answer to this expectation and show that such geometrical fluids and their interaction with other parts of cosmos may also affect the horizon entropy of FRW universe [33][34][35][36].…”

Section: Introductionmentioning

confidence: 98%

Thermodynamical Study of FRW Universe in Quasi-Topological Theory

Moradpour

Dehghani

2016

Advances in High Energy Physics

View full text Add to dashboard Cite

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 Hayward-Kodama and Cai-Kim temperatures are also addressed. Our study shows that whenever, there is no energy exchange between the various parts of cosmos, we can get an expression for the apparent horizon entropy in quasi-topological gravity, which is in agreement with other attempts followed different approaches. The effects of a mutual interaction between the various parts of cosmos on the apparent horizon entropy as well as the validity of second law of thermodynamics in quasi-topological gravity are also perused.

show abstract

“…It is seen that this equation is similar to the Clausius relation δQ = T dS for a dynamical black hole. Recently, Mitra et al [28][29][30] examined the unified first law (equation above) for different gravity theories in a FRW universe model that is bounded by an apparent horizon or event horizon. However, Zubair and Jawad [31] obtained the generalized second law of gravitational thermodynamics (GSLT) inequality for F (T , T G ) gravity theory.…”

Section: Introductionmentioning

confidence: 99%

Super inflation mechanism and dark energy from a cosmological entropy perspective

Keskin¹

2018

Turk J Phys

View full text Add to dashboard Cite

Various approaches are developed that provide a unification of the early inflationary epoch of the universe and dark energy (cosmic accelerating expansion case). In one respect, we express this unification in a universal thermodynamic framework within the context of F (T, TG) gravity, where T represents the torsion invariant and TG is the teleparallel equivalent of the Gauss-Bonnet term. For a Friedmann-Robertson-Walker universe model bounded by the dynamical apparent horizon, we explore the generalized second law of gravitational thermodynamics (GSLT). Finally, we discuss the super inflation mechanism, the deceleration case (radiation and dust regions), and the late time cosmic acceleration of the universe into the validity of the GSLT that we obtain.

show abstract

A study of Universal thermodynamics in Lanczos–Lovelock gravity

Cited by 10 publications

References 69 publications

Cosmological consequences in the framework of generalized Rastall theory of gravity

Cosmological consequences in the framework of generalized Rastall theory of gravity

Thermodynamical Study of FRW Universe in Quasi-Topological Theory

Super inflation mechanism and dark energy from a cosmological entropy perspective

Contact Info

Product

Resources

About