Modified entropic gravity revisited

Wang, Tower

doi:10.1007/s11433-014-5545-7

Cited by 9 publications

(13 citation statements)

References 75 publications

(92 reference statements)

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“…Our results and the papers [14][15][16][17][18][19][20][21] show that the entropic gravity proposal provides a powerful framework to obtain the generalized theory of gravity by using thermodynamical quantities.…”

Section: Discussionsupporting

confidence: 59%

“…In other words, it can be seen as a restriction for this kind of modified entropic gravity because only few values for a b = −∇ b φ are permitted by this requirement. According to Wang's paper [18], this result reminds the Chern-Simons (CS) modification of general relativity [49] in which conservation of the energy-momentum is unwarranted by gravitational equations. So, one can consider the last equation as a criterion of admissible metrics in modified models of entropic gravity.…”

Section: Generalized Einstein Field Equationsmentioning

confidence: 88%

“…In the light of the above theoretical background, it is easy to say that the entropic gravity approach provides a powerful framework to generalize the theory of gravity. For instance, if we use generalized thermodynamic quantities such as entropy in the entropic gravity approach, we can find a generalized model of the theory of gravity [14][15][16][17][18][19][20][21]. Therefore, it may help us to find a deep understanding of the nature of space-time and gravity.…”

Section: Introductionmentioning

confidence: 99%

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Generalized entropic gravity from modified Unruh temperature

Kibaroğlu

2019

Int. J. Mod. Phys. A

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In this study, the effects of the generalized uncertainty principle on the theory of gravity are analyzed. Inspired by Verlinde's entropic gravity approach and using the modified Unruh temperature, the generalized Einstein field equations with cosmological constant are obtained and corresponding conservation law is investigated. The resulting conservation law of energy-momentum tensor dictates that the generalized Einstein field equations are valid in a very limited range of accelerations. Moreover, the modified Newton's law of gravity and the modified Poisson equation are derived. In a certain limit, these modified equations reduce to their standard forms.

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Section: Discussionsupporting

confidence: 59%

Section: Generalized Einstein Field Equationsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Generalized entropic gravity from modified Unruh temperature

Kibaroğlu

2019

Int. J. Mod. Phys. A

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“…Unfortunately, in our reading of [14] and previous works, we had to make several leaps of fates [309]. As expected, considering the approach, some observations [181] and models [180,179] seem to invalidate some of the assumptions and predictions. For example, [179] questions the suitability of this approach and the value to attach to its derivation of gravity.…”

Section: Entropic Emergence Of Gravitymentioning

confidence: 89%

Quantum Gravity Emergence from Entanglement in a Multi-Fold Universe

Maes¹

2020

Preprint

217

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We start from a hypothetical multi-fold universe U_{MF}}, where the propagation of everything is slower or equal to the speed of light and where entanglement extends the set of paths available to Path Integrals. This multi-fold mechanism enables EPR (Einstein-Podolsky-Rosen) “spooky actions at distance” to result from local interactions in the resulting folds. It produces gravity-like attractive effective potentials in the spacetime, between entangled entities, that are caused by the curvature of the folds. When quantized, multi-folds correspond to gravitons and they are enablers of EPR entanglement. Gravity emerges non-perturbative and covariant from EPR entanglement between virtual particles surrounding an entity.In U_{MF}, we encounter mechanisms that predict gravity fluctuations when entanglement is present, including in macroscopic entanglements. Besides providing a new perspective on quantum gravity, when added to the Standard Model and Standard Cosmology, U_{MF} can contribute explanations of several open questions and challenges. It also clarifies some relationships and challenges met by other quantum gravity models and Theories of Everything. It leads to suggestions for these works.We also reconstruct the spacetime of U_{MF}, starting from the random walks of particles in an early spacetime. U_{MF} now appears as a noncommutative, discrete, yet Lorentz symmetric, spacetime that behaves roughly 2-Dimensional at Planck scales, when it is a graph of microscopic Planck size black holes on a random walk fractal structure left by particles that can also appear as also microscopic black holes. Of course, at larger scales, spacetime appears 4-D, where we are able to explain curvature and recover Einstein’s General Relativity. We also discover an entanglement gravity-like contributions and massive gravity at very small scales. This is remarkable considering that no Hilbert Einstein action, or variations expressing area invariance, were introduced. Our model also explains why semi classical approaches can work till way smaller scale than usually expected and present a new view on an Ultimate Unification of all forces, at very small scales.We also explore opportunities for falsifiability and validation of our model, as well as ideas for futuristic applications that may be worth considering, if U_{MF} was a suitable model for our universe U_{real}.

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“…Because if one uses the generalized forms of entropy, temperature or active gravitational mass functions instead of the standard ones, these idea may lead to generalize the gravitational field equations. From these ideas, many authors have extensively studied the extended gravity theories based on the entropic gravity proposal such as [18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Friedmann equations for deformed entropic gravity

Kibaroğlu

Şenay

2020

Int. J. Mod. Phys. D

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In this study, we investigate the effects of the one and two-parameters deformed systems on the Friedmann equations of the Friedmann-Robertson-Walker (FRW) universe in the context of the entropic gravity approach. We give simplified forms for the deformed Unruh temperature and Einstein field equations for three different deformed systems. Based on these compact equations, we derive the Friedmann equations with the effective gravitational and cosmological constant.

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Modified entropic gravity revisited

Cited by 9 publications

References 75 publications

Generalized entropic gravity from modified Unruh temperature

Generalized entropic gravity from modified Unruh temperature

Quantum Gravity Emergence from Entanglement in a Multi-Fold Universe

Friedmann equations for deformed entropic gravity

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