Entropic gravity ≈ Entropic gravity
View article: Emergent Gravity and the Dark Universe
Emergent Gravity and the Dark Universe Open
Recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law …
View article
The gravity dual of Rényi entropy Open
A remarkable yet mysterious property of black holes is that their entropy is proportional to the horizon area. This area law inspired the holographic principle, which was later realized concretely in gauge-gravity duality. In this context,…
View article
Entropy, extremality, euclidean variations, and the equations of motion Open
We study the Euclidean gravitational path integral computing the Rényi entropy and analyze its behavior under small variations. We argue that, in Einstein gravity, the extremality condition can be understood from the variational principle …
View article
Weak gravity conjecture Open
The weak gravity conjecture holds that in a theory of quantum gravity any gauge force must mediate interactions stronger than gravity for some particles. This statement has surprisingly deep and extensive connections to many different area…
View article
Testing gravity with cold atom interferometry: results and prospects Open
Atom interferometers have been developed in the last three decades as new powerful tools to investigate gravity. They were used for measuring the gravity acceleration, the gravity gradient, and the gravity-field curvature, for the determin…
View article
A holographic derivation of the weak gravity conjecture Open
A bstract The Weak Gravity Conjecture (WGC) demands the existence of superextremal particles in any consistent quantum theory of gravity. The standard lore is that these particles are introduced to ensure that extremal black holes are eith…
View article
Entanglement equilibrium for higher order gravity Open
We show that the linearized higher derivative gravitational field equations\nare equivalent to an equilibrium condition on the entanglement entropy of small\nspherical regions in vacuum. This extends Jacobson's recent derivation of the\nEi…
View article
What is the entropy in entropic gravity? Open
We explore theories in which gravity arises as a consequence of entropy. We distinguish between two approaches to this idea: holographic gravity, in which Einstein’s equation arises from keeping entropy stationary in equilibrium under vari…
View article
Gravity and Cosmology in Kaniadakis Statistics: Current Status and Future Challenges Open
Kaniadakis statistics is a widespread paradigm to describe complex systems in the relativistic realm. Recently, gravitational and cosmological scenarios based on Kaniadakis (κ-deformed) entropy have been considered, leading to generalized …
View article
Spacetime and Gravity are 2D around Planck Scales: A Universal Property of Consistent Quantum Gravity Open
This short paper shows that General Relativity (GR) combined with Quantum Physics implies spacetime and quantum gravity with 2D degrees of freedom at very small scales.The result is obtained independently of any other assumption on the und…
View article
Searches for beyond-Riemann gravity Open
Many effective field theories describing gravity cannot arise from an underlying theory based on Riemann geometry or its extensions to include torsion and nonmetricity but may instead emerge from another geometry or may have a nongeometric…
View article
Cosmological gravity probes: Connecting recent theoretical developments to forthcoming observations Open
Since the discovery of the accelerated expansion of the present universe, significant theoretical developments have been made in the area of modified gravity. In the meantime, cosmological observations have been providing more high-quality…
View article
Quantum Gravity If Non-Locality Is Fundamental Open
I take non-locality to be the Michelson–Morley experiment of the early 21st century, assume its universal validity, and try to derive its consequences. Spacetime, with its locality, cannot be fundamental, but must somehow be emergent from …
View article
Universal Pattern in Quantum Gravity at Infinite Distance Open
Quantum gravitational effects become significant at a cutoff that can be much lower than the Planck scale whenever there is a large number of light fields. This is expected to occur at any perturbative limit of an effective field theory co…
View article
Background independent field quantization with sequences of gravity-coupled approximants Open
We outline, test, and apply a new scheme for nonpertubative analyses of quantized field systems in contact with dynamical gravity. While gravity is treated classically in the present paper, the approach lends itself for a generalization to…
View article
New insights into quantum gravity from gauge/gravity duality Open
Using gauge/gravity duality, we deduce several nontrivial consequences of quantum gravity from simple properties of the dual field theory. These include: (1) a version of cosmic censorship, (2) restrictions on evolution through black hole …
View article
Turning on gravity with the Higgs mechanism Open
We investigate how a Higgs mechanism could be responsible for the emergence of gravity in extensions of Einstein theory, with a suitable low energy limit. In this scenario, at high energies, symmetry restoration could 'turn off' gravity, w…
View article
Exploring the gravity sector of emergent higher-spin gravity: effective\n action and a solution Open
We elaborate the description of the semi-classical gravity sector of\nYang-Mills matrix models on a covariant quantum FLRW background. The basic\ngeometric structure is a frame, which arises from the Poisson structure on an\nunderlying $S^…
View article
<i>q</i>-deformed Einstein equations from entropic force Open
In this study, we investigate the influences of fermionic q-deformation on the Einstein equations by taking into account of Verlinde’s entropic gravity approach and Strominger’s proposal on quantum black holes. According to Verlinde’s prop…
View article
Long-Range Quantum Gravity Open
It is a tantalising possibility that quantum gravity (QG) states remaining coherent at astrophysical, galactic and cosmological scales could exist and that they could play a crucial role in understanding macroscopic gravitational effects. …
View article
Higher derivative gravity: Field equation as the equation of state Open
One of the striking features of general relativity is that the Einstein\nequation is implied by the Clausius relation imposed on a small patch of\nlocally constructed causal horizon. Extension of this thermodynamic derivation\nof the field…
View article
Gravity from transactions: fulfilling the entropic gravity program Open
This is a comprehensive review of new developments in entropic gravity in light of the Relativistic Transactional Interpretation (RTI). A transactional approach to spacetime events can give rise in a natural way to entropic gravity (in the…
View article
Analogue gravity models of emergent gravity: lessons and pitfalls Open
Analogue models of gravity have provided a test bed for many classical and quantum field theory effects in curve spacetime. Here we present a review of some relevant results towards their extension as toy models of emergent gravity scenari…
View article
General formulae for conserved charges and black hole entropy in Chern-Simons-like theories of gravity Open
This paper deals with the problem of defining off-shell conserved charges in a set of theories known as Chern-Simons-like theories of gravity (CSLTG). The method is derived in a general way, which may find applications in a wide set of the…
View article
Topological induced gravity Open
We propose a topological model of induced gravity (pregeometry) where both Newton’s coupling constant and the cosmological constant appear as integration constants in solving field equations. The matter sector of a scalar field is also con…
View article
Space, and the Nature of Gravity Open
In taking up from the preliminary papers [1-11], the idea of gravity as a process of the nature of space shall be presented; the idea of space will be defined in a way that is able to support how Newton derived the equation for gravity usi…
View article
Renormalizability of Alternative Theories of Gravity: Differences between Power Counting and Entropy Argument Open
It is well known that General Relativity cannot be considered under the standard of a perturbatively renormalizable quantum field theory, but asymptotic safety is taken into account as a possibility for the formulation of gravity as a non-…
View article
A unified picture of cosmological entropy on apparent horizon in <i>F</i>(<i>R</i>, <i>G</i>) gravity Open
In this study, the validity of the generalized second law of thermodynamics (GSLT) has been investigated in F(R, G) gravity. We consider that the boundary of the universe is surrounded by an apparent horizon in the spatially flat Friedmann…
View article
Non-full equivalence of the four-dimensional Einstein-Gauss-Bonnet gravity and Horndeksi gravity for Bianchi type I metric Open
The four-dimensional Einstein-Gauss-Bonnet (4DEGB) gravity is proposed as a singular limit of the higher-dimensional EGB gravity with a rescaled coupling constant. Follow-up work indicates that the 4DEGB gravity may be equivalent to a spec…
View article
Generalized Einstein’s Equations from Wald Entropy Open
We derive the gravitational equations of motion of general theories of gravity from thermodynamics applied to a local Rindler horizon through any point in spacetime. Specifically, for a given theory of gravity, we substitute the correspond…