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Theory in modern physics that describes gravity as an entropic force
Entropic gravity, also known as emergent gravity, is a theory in modern physics that describes gravity as an entropic force—a force with macro-scale homogeneity
Entropic_gravity
Dutch theoretical physicist
Spinoza-institute on 8 December 2009 he introduced a theory of entropic gravity. In this theory, gravity exists because of a difference in concentration of information
Erik_Verlinde
Hypothetical invisible cosmic material
dynamics (MOND), tensor–vector–scalar gravity, and entropic gravity. So far, none of the proposed modified gravity theories can describe every piece of
Dark_matter
Idea in quantum gravity
thermodynamics Entropic force Entropic gravity List of quantum gravity researchers Superfluid vacuum theory Einstein–Cartan theory H. Kleinert (1987). "Gravity as
Induced_gravity
Theory of quantum gravity merging quantum mechanics and general relativity
loop quantum gravity, and Lee Smolin et al. with Verlinde entropic gravity and loop gravity. Stephon Alexander, Antonino Marciano and Lee Smolin have
Loop_quantum_gravity
Physical force that originates from thermodynamics instead of fundamental interactions
implies that the pressure of an ideal gas has an entropic origin. What is the origin of such an entropic force? The most general answer is that the effect
Entropic_force
Principle in theoretical physics
black holes Bousso's holographic bound Brane cosmology Digital physics Entropic gravity Implicate and explicate order Quantum speed limit theorems Physical
Holographic_principle
Theory of gravitation as curved spacetime
known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in
General_relativity
Description of gravity using discrete values
Quantum gravity (QG) is a field of theoretical physics that seeks unification of the theory of gravity with the principles of quantum mechanics. It deals
Quantum_gravity
Property of a thermodynamic system
Conformational entropy Entropic explosion Entropic force Entropic value at risk Entropy and life Entropy unit Free entropy Harmonic entropy Info-metrics
Entropy
Attraction of masses and energy
In physics, gravity (from Latin gravitas 'weight'), also known as gravitation or a gravitational interaction, is a fundamental interaction, which may
Gravity
Kinetic theory of gravity
Le Sage's theory of gravitation is a kinetic theory of gravity originally proposed by Nicolas Fatio de Duillier in 1690 and later by Georges-Louis Le
Le Sage's theory of gravitation
Le_Sage's_theory_of_gravitation
Classical statement of gravity as force
Newton's law of universal gravitation describes gravity as a force by stating that every particle attracts every other particle in the universe with a
Newton's law of universal gravitation
Newton's_law_of_universal_gravitation
Hypothesis proposing a modification of Newton's laws
Proposed theories of gravity Entropic gravity – Theory in modern physics that describes gravity as an entropic force AQUAL – Theory of gravity TeVeS – Relativistic
Modified_Newtonian_dynamics
American physicist
research focuses on the dark energy problem and cosmic expansion. Entropic gravity Ted Jacobson, "Thermodynamics of Spacetime: The Einstein Equation of
Ted_Jacobson
Theory extending Einstein gravity
Quadratic gravity (QG) is an extension of general relativity obtained by adding all local quadratic-in-curvature terms to the Einstein–Hilbert Lagrangian
Quadratic_gravity
Gravity theories that are invariant under Weyl transformations
Conformal gravity refers to gravity theories that are invariant under conformal transformations in the Riemannian geometry sense; more accurately, they
Conformal_gravity
Vector field representing a mass's effect on surrounding space
influence. Classical mechanics Entropic gravity Gravitation Gravitational energy Gravitational potential Gravitational wave Gravity map Newton's law of universal
Gravitational_field
Hypothetical physical concept
fundamental interactions: electromagnetism, strong and weak nuclear forces, and gravity. Finding such a theory is one of the major unsolved problems in physics
Theory_of_everything
Theory of quantum gravity
Hořava–Lifshitz gravity (or Hořava gravity) is a theory of quantum gravity proposed by Petr Hořava in 2009. It solves the problem of different concepts
Hořava–Lifshitz_gravity
Gravity filtration is a method of filtering impurities from solutions by using gravity to pull liquid through a filter. The two main kinds of filtration
Gravity_filtration
Topics referred to by the same term
Emergent gravity may refer to Induced gravity, a theory proposed by Andrei Sakharov in 1967, Entropic gravity, a theory proposed by Erik Verlinde in 2009
Emergent_gravity
Concept in general relativity and quantum field theory
developed by replacing entropy with black hole horizon area and replacing temperature with black hole horizon surface gravity. Having temperature implies
Black_hole_thermodynamics
Linear perturbations to solutions of nonlinear Einstein field equations
gravity is the application of perturbation theory to the metric tensor that describes the geometry of spacetime. As a consequence, linearized gravity
Linearized_gravity
Contraction of an astronomical object due to the influence of its gravity
object due to the influence of its own gravity, which tends to draw matter inward toward the center of gravity. Gravitational collapse is a fundamental
Gravitational_collapse
Field theory in physics that aims to unify the fundamental forces and particles
of field theory that allows all fundamental forces of nature, including gravity, and all elementary particles to be written in terms of a single physical
Unified_field_theory
Physical theory with matter as quantum fields but gravity as a classical field
Semiclassical gravity is an approximation to the theory of quantum gravity in which one treats matter and energy fields as being quantum and the gravitational
Semiclassical_gravity
their specific gravity. In the 6th century AD, Byzantine Alexandrian scholar John Philoponus modified the Aristotelian concept of gravity with the theory
History of gravitational theory
History_of_gravitational_theory
Theory of gravity
physics, f(R) is a type of modified gravity theory which generalizes Einstein's general relativity. f(R) gravity is actually a family of theories, each
F(R)_gravity
Model of gravity with dilation
theoretical physics, Jackiw–Teitelboim gravity, also known as JT gravity or the R=T model, is a theory of gravity with a dilaton in one spatial and one
Jackiw–Teitelboim_gravity
Czech physicist and translator
of quantum mechanics", and has strongly criticised Erik Verlinde's entropic gravity theory. In April 2022, Motl retired the blog, citing censorship pressures
Luboš_Motl
Approach to quantum gravity utilizing Wick rotations
gravity exploits the Wick rotation to describe gravity according to the principles of quantum mechanics. This particular approach to quantum gravity is
Euclidean_quantum_gravity
General relativity in 2+1 dimensions
Because of this property, (2+1)-dimensional topological gravity (2+1D topological gravity) is a topological quantum field theory: the global structure
(2+1)-dimensional topological gravity
(2+1)-dimensional_topological_gravity
Approach to quantum gravity using discrete spacetime
The causal sets program is an approach to quantum gravity. Its founding principles are that spacetime is fundamentally discrete (a collection of discrete
Causal_sets
physics CGHS model RST model Mechanical explanations Fatio–Le Sage Entropic gravity Physics in the medieval Islamic world Theory of impetus Related topics
Chasles'_theorem_(gravity)
Attempt to find a consistent theory of quantum gravity
Although originally proposed by Steven Weinberg to find a theory of quantum gravity, the idea of a nontrivial fixed point providing a possible UV completion
Asymptotic_safety
Classical theory of gravitation
theory gravity Loop quantum gravity Cabral, Francisco; Lobo, Francisco S. N.; Rubiera-Garcia, Diego (December 2019). "Einstein–Cartan–Dirac gravity with
Einstein–Cartan_theory
Restatement of Newton's law of universal gravitation
In physics, Gauss's law for gravity, also known as Gauss's flux theorem for gravity, is a law of physics that is equivalent to Newton's law of universal
Gauss's_law_for_gravity
Theory of gravity in which the graviton has nonzero mass
In theoretical physics, massive gravity is a theory of gravity that modifies general relativity by endowing the graviton with a nonzero mass. In the classical
Massive_gravity
Analogies between Maxwell's and Einstein's field equations
equations for general relativity. Gravitomagnetism is the kinetic effects of gravity, in analogy to the magnetic effects of moving electric charge. The most
Gravitoelectromagnetism
Proposed theories of gravity
Bimetric gravity or bigravity refers to two different classes of theories. The first class of theories relies on modified mathematical theories of gravity (or
Bimetric_gravity
Proposed theories of gravity
ideal theory of gravity. These attempts can be split into four broad categories based on their scope: Classical theories of gravity, which do not involve
Alternatives to general relativity
Alternatives_to_general_relativity
In theoretical physics, Lovelock's theory of gravity (often referred to as Lovelock gravity) is a generalization of Einstein's theory of general relativity
Lovelock_theory_of_gravity
Theory of subatomic structure
gauge-gravity duality and is now understood to be a special case of the AdS/CFT correspondence. Andrew Strominger and Cumrun Vafa calculated the entropy of
String_theory
Hypothetical particle
theory's compactifications of extra dimensions. In Brans–Dicke theory of gravity, Newton's constant is not presumed to be constant but instead 1/G is replaced
Dilaton
Nonpertubative field theoretic approach to quantum gravity
The asymptotic safety approach to quantum gravity provides a nonperturbative notion of renormalization in order to find a consistent and predictive quantum
Physics applications of asymptotically safe gravity
Physics_applications_of_asymptotically_safe_gravity
Attempt to describe spacetime and associated phenomena in terms of geometry
quantum gravity. The philosophical program also continues to motivate several prominent contributors. Topological ideas in the realm of gravity date back
Geometrodynamics
Class of models of gravitation treating gravitons as composite particles
In theoretical physics, composite gravity refers to models that attempted to derive general relativity in a framework where the graviton is constructed
Composite_gravity
Theories of higher-dimensional general relativity
Higher-dimensional Einstein gravity is any of various physical theories that attempt to generalize to higher dimensions various results of the standard
Higher-dimensional Einstein gravity
Higher-dimensional_Einstein_gravity
Theory of gravity on antimatter
As was predicted by most physicists, the experiment showed that Earth's gravity attracts antimatter at the same rate as matter, within experimental error
Gravitational interaction of antimatter
Gravitational_interaction_of_antimatter
Relativistic generalization of Mordehai Milgrom's MOND paradigm
Tensor–vector–scalar gravity (TeVeS), developed by Jacob Bekenstein in 2004, is a relativistic generalization of Mordehai Milgrom's Modified Newtonian
Tensor–vector–scalar_gravity
Formulation of general relativity
physics, canonical quantum gravity is an attempt to quantize the canonical formulation of general relativity (or canonical gravity). It is a Hamiltonian formulation
Canonical_quantum_gravity
Models of the universe which deviate from then-current scientific consensus
energy without invoking a cosmological constant. Entropic gravity, which describes gravity as an entropic force with macro-scale homogeneity but which is
Non-standard_cosmology
Geometric algebra approach to gravity
Gauge theory gravity (GTG) is a theory of gravitation cast in the mathematical language of geometric algebra. To those familiar with general relativity
Gauge_theory_gravity
Hypothetical approach to quantum gravity with emergent spacetime
Ambjørn and Jerzy Jurkiewicz, is an approach to quantum gravity that, like loop quantum gravity, is background independent. This means that it does not
Causal dynamical triangulation
Causal_dynamical_triangulation
Tensor field in Riemannian geometry
mathematical tool in the theory of general relativity, the modern theory of gravity. The curvature of spacetime is in principle observable via the geodesic
Riemann_curvature_tensor
Theory of gravity
In general relativity, Gauss–Bonnet gravity, also referred to as Einstein–Gauss–Bonnet gravity, is a modification of the Einstein–Hilbert action to include
Gauss–Bonnet_gravity
Theory proposed by Roger Penrose
theories, but its gravity degrees of freedom gave rise to a version of conformal supergravity limiting its applicability; conformal gravity is an unphysical
Twistor_theory
Theory of gravity
(also called teleparallel gravity), was an attempt by Albert Einstein to base a unified theory of electromagnetism and gravity on the mathematical structure
Teleparallelism
Comformal theory of gravity
The Hoyle–Narlikar theory of gravity is a Machian and conformal theory of gravity proposed by Fred Hoyle and Jayant Narlikar that originally fits into
Hoyle–Narlikar theory of gravity
Hoyle–Narlikar_theory_of_gravity
Concept in quantum physics
Entanglement entropy was first proposed by Sorkin as a source for black hole entropy, and remains a candidate. It is thought to have connections to gravity, and
Entropy_of_entanglement
Theory of gravity
Infinite derivative gravity is a theory of gravity which attempts to remove cosmological and black hole singularities by adding extra terms to the Einstein–Hilbert
Infinite_derivative_gravity
1973 novel by Thomas Pynchon
Gravity's Rainbow is a 1973 novel by Thomas Pynchon. The narrative is set primarily in Europe at the end of World War II and centers on the design, production
Gravity's_Rainbow
Modern theory of gravitation that combines supersymmetry and general relativity
supersymmetry as a gauge theory makes gravity arise in a natural way. Like all covariant approaches to quantum gravity, supergravity contains a spin-2 field
Supergravity
Scientific device
and after a collision. The track can be used to calculate the force of gravity when placed at an angle. It was invented in the early 1960s at the California
Air_track
Concept in physics
theory: a nonsymmetric tensor composed of a symmetric part representing gravity, and an antisymmetric part that represents electromagnetism. Research in
Nonsymmetric gravitational theory
Nonsymmetric_gravitational_theory
Physics theory
Rainbow gravity (or "gravity's rainbow") is a theory that different wavelengths of light experience different gravity levels and are separated in the
Rainbow_gravity_theory
Modified theory of gravity developed by John Moffat
Scalar–tensor–vector gravity (STVG) is a modified theory of gravity developed by John Moffat, a researcher at the Perimeter Institute for Theoretical Physics
Scalar–tensor–vector_gravity
Hypothetical elementary particle that mediates gravity
In theories of quantum gravity, the graviton is the hypothetical elementary particle that mediates the force of gravitational interaction. It is a quantum
Graviton
definition of entropy does not have a clear thermodynamical interpretation. The BGS entropy has been used in the context of quantum gravity. Braunstein
Braunstein–Ghosh–Severini entropy
Braunstein–Ghosh–Severini_entropy
Upper limit on entropy in physics
thermodynamics, the holographic principle and the covariant entropy bound of quantum gravity, and can be derived from a conjectured strong form of the latter
Bekenstein_bound
Proposed theory of gravitation
Faroni, Valerio (1999). "Illusions of general relativity in Brans-Dicke gravity". Phys. Rev. D59 (8) 084021. arXiv:gr-qc/9902083. Bibcode:1999PhRvD..59h4021F
Brans–Dicke_theory
Unified field theory
like ordinary gravity in free space, except that it is phrased in five dimensions instead of four. The equations governing ordinary gravity in free space
Kaluza–Klein_theory
Use of the second law of thermodynamics to distinguish past from future
uniformly. For a system in which gravity is important, such as the universe, this is a low-entropy state (compared to a high-entropy state of having all matter
Entropy_as_an_arrow_of_time
Early attempts to explain gravity
kinetic theories of gravitation) are attempts to explain the action of gravity by aid of basic mechanical processes, such as pressure forces caused by
Mechanical explanations of gravitation
Mechanical_explanations_of_gravitation
Physical law for entropy and heat
gases) have high entropy. The paradox is solved once realizing that gravitational systems have negative heat capacity, so that when gravity is important,
Second_law_of_thermodynamics
Theory of fundamental physics
of the four known fundamental interactions) with gravity, making SVT a derivative of quantum gravity and describes all known interactions in the Universe
Superfluid_vacuum_theory
Theory of gravity
AQUAL is a theory of gravity based on Modified Newtonian Dynamics (MOND), but using a Lagrangian. It was developed by Jacob Bekenstein and Mordehai Milgrom
AQUAL
Classical field theory describing gravitation
After the formulation of Yang–Mills theory, there were efforts to write gravity into a gauge field theory like the other forces in the Standard Model of
Poincaré_gauge_theory
Aspect of theoretical physics
the 1960s as a new approach to the unification of quantum theory with gravity. Twistor space is a three-dimensional complex projective space in which
Twistor_string_theory
simply replace the divergence operator in the field equation of Newtonian gravity with the d'Alembertian operator ◻ = ∂ t 2 − ∇ 2 {\displaystyle \square
Scalar theories of gravitation
Scalar_theories_of_gravitation
Bi-scalar tensor vector gravity theory (BSTV) is an extension of the tensor–vector–scalar gravity theory (TeVeS). TeVeS is a relativistic generalization
Bi-scalar tensor vector gravity
Bi-scalar_tensor_vector_gravity
Fringe theory of physics
presented as an extension of the Grand Unified Theory program, incorporating gravity and fermions. The theory received a flurry of media coverage, but was also
An Exceptionally Simple Theory of Everything
An_Exceptionally_Simple_Theory_of_Everything
1922 theory, now obsolete
ISBN 978-1-107-60052-2. Bain, Jonathan (1998). "Whitehead's Theory of Gravity". Stud. Hist. Phil. Mod. Phys. 29 (4): 547–574. Bibcode:1998SHPMP..29.
Whitehead's theory of gravitation
Whitehead's_theory_of_gravitation
Subgenre of science fiction, sometimes with elements of science fantasy
renewal. A related subgenre set in the distant future of entropic decay is called entropic romance. The Dying Earth genre differs from the apocalyptic
Dying_Earth_(genre)
Dungeons & Dragons character class
wizards can access dunamancy which "involves the manipulation of entropy, gravity, and time" where "dunamancers draw power from alternate timelines and
Wizard_(Dungeons_&_Dragons)
Hypothetical quantum cosmological effect
horizon has been made using loop quantum gravity. Loop-quantization does not reproduce the result for black hole entropy originally discovered by Bekenstein
Hawking_radiation
Possible fate of the universe
to a state of no thermodynamic free energy and, having reached maximum entropy, will therefore be unable to sustain any further thermodynamic processes
Heat_death_of_the_universe
Enthalpy–entropy chart Entrainment (hydrodynamics) Entrainment (physics) Entrance pupil Entropic explosion Entropic force Entropic gravity Entropy Entropy (arrow
Index_of_physics_articles_(E)
Theoretical Physics
holography (an approach to quantum gravity) that posits a quantitative relationship between the entanglement entropy of a conformal field theory and the
Ryu–Takayanagi_conjecture
Toy model of general relativity
will turn the 2+1D model into one admitting mixed propagating dilaton-gravity waves, as well as making the 1+1D model geometrically nontrivial locally
CGHS_model
Units defined only by physical constants
distance scale of interest in speculations about quantum gravity. The Bekenstein–Hawking entropy of a black hole is one-fourth the area of its event horizon
Planck_units
Part of the history of physics
In the history of physics, the concept of entropy developed in response to the observation that a certain amount of functional energy released from combustion
History_of_entropy
Equivalence class of spin networks
Relativity: Loop Quantum Gravity: Diffeomorphism invariance Rovelli, Carlo (1996-10-14). "Black Hole Entropy from Loop Quantum Gravity". Physical Review Letters
S-knot
Hypothetical black-hole event-horizon phenomenon
paradox was that of locality. A common view is that theories of quantum gravity do not obey exact locality, which leads to a resolution of the paradox
Firewall_(physics)
Predecessor to the theory of relativity
term expresses the fact that Einstein gravity is slightly stronger "at corresponding points" than Nordström gravity. The tidal tensor measured by a static
Nordström's theory of gravitation
Nordström's_theory_of_gravitation
Theory of gravity
Higher-Order Scalar-Tensor theories (or DHOST theories) are theories of modified gravity. They have a Lagrangian containing second-order derivatives of a scalar
Degenerate Higher-Order Scalar-Tensor theories
Degenerate_Higher-Order_Scalar-Tensor_theories
Numerical coefficient in loop quantum gravity
semiclassical black hole entropy, as calculated by Stephen Hawking, and the counting of microstates in loop quantum gravity. The Immirzi parameter arises
Immirzi_parameter
Proposed model of gravity
The Dvali–Gabadadze–Porrati (DGP) model is a model of gravity proposed by Gia Dvali, Gregory Gabadadze, and Massimo Porrati in 2000. The model is popular
DGP_model
Hypothetical gravitational particle
The pressuron is a hypothetical scalar particle which couples to both gravity and matter theorised in 2013. Although originally postulated without self-interaction
Pressuron
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