Quantum gravity

Definition

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 with environments in which neither gravitational nor quantum effects can be ignored, such as in the vicinity of black holes or similar compact astrophysical objects, as well as in the early stages of the universe moments after the Big Bang.

Related concepts

(2+1)-dimensional topological gravity ADM formalism AQUAL Abhay Ashtekar AdS/CFT AdS/CFT correspondence Albert Einstein Alcubierre drive Alexander Friedmann Alternatives to general relativity An Exceptionally Simple Theory of Everything Annalen der Physik Anthony Zee Apsidal precession Aristotelian physics Arthur Eddington Ashtekar variables Asymptotic freedom Asymptotic safety Asymptotic safety in quantum gravity B-modes BICEP and Keck Array BKL singularity BSSN formalism Background-independent Background independence Barton Zwiebach Basic Books Batalin–Vilkovisky formalism Bekenstein bound Bekenstein–Hawking entropy formula Bell test Big Bang Bimetric gravity Biquaternion Black hole Black hole complementarity Black hole information paradox Black hole radiation Black hole thermodynamics Black holes Born rule Boson Bosonic string theory Bousso's holographic bound Brans–Dicke theory Bra–ket notation Bunch–Davies vacuum CA-duality CGHS model CGh physics CP violation Cabibbo–Kobayashi–Maskawa matrix Calabi–Yau manifold Cambridge University Press Canonical quantization Canonical quantum gravity Carlo Rovelli Casimir effect Causal dynamical triangulation Causal fermion system Causal patch Causal sets Causal structure Charge (physics)Charles W. Misner Christopher Isham Classical and Quantum Gravity Classical field theory Classical mechanics Color charge Compactification (physics)Complementarity (physics)Composite gravity Conformal gravity Consciousness causes collapse Consistent histories Copenhagen interpretation Cosmic censorship hypothesis Cosmic dust Cosmic microwave background Cosmological constant Cosmological constant problem Current Science DGP model Dark energy Dark matter David Hilbert Davisson–Germer experiment De Broglie–Bohm theory De Sitter relativity Degenerate Higher-Order Scalar-Tensor theories Degenerate energy levels Delayed-choice quantum eraser Density matrix Dilaton Dirac equation Double-slit experiment Double copy theory Doubly special relativity Dual graviton ER = EPR ESA Edward Arthur Milne Edward N. Zalta Edward Witten Effective field theory Einstein cross Einstein field equations Einstein rings Einstein–Cartan theory Einstein–Podolsky–Rosen paradox Electric Electric field Electromagnetism Electroweak interaction Elitzur–Vaidman bomb tester Ellis wormhole Energy level Ensemble interpretation Entropic gravity Equivalence principle Ernst equation Eternal inflation Euclidean quantum gravity Event horizon Exact solutions in general relativity Excited state F(R) gravity F-theory FRW/CFT duality Faddeev–Popov ghost Fermi's interaction Fermion Firewall (physics)Force particle Frame-dragging Frame of reference Franck–Hertz experiment Friedmann equations Friedmann–Lemaître–Robertson–Walker metric Fritz Zwicky Fundamental forces Fundamental interaction GEO600 Galilean invariance Galilean transformation Gamma-ray burst Gauge boson Gauge theory Gauge theory gravity Gauss's law for gravity Gauss–Bonnet gravity General Relativity and Gravitation General relativity General theory of relativity Geodesics in general relativity Geodetic effect Geometrodynamics Georges Lemaître Gibbons–Hawking–York boundary term Glossary of elementary quantum mechanics Grand Unified Theory Gravitation Gravitational-wave astronomy Gravitational-wave observatory Gravitational anomaly Gravitational decoherence Gravitational field Gravitational interaction of antimatter Gravitational lens Gravitational redshift Gravitational singularity Gravitational time dilation Gravitational wave Gravitomagnetism Graviton Gravity Ground state Group field theory Gödel metric Hamiltonian (quantum mechanics)Hamilton–Jacobi–Einstein equation Hartle–Hawking proposal Hawking radiation Heisenberg picture Hendrik Lorentz Henri Poincaré Hermann Bondi Hermann Weyl Heterotic string theory Hidden-variable theory Hierarchy problem Higgs boson Higgs mechanism History of general relativity History of gravitational theory History of quantum field theory History of quantum mechanics History of string theory Holographic principle Howard P. Robertson Hořava–Lifshitz gravity Hulse–Taylor binary Hyperbolic orthogonality INTEGRAL IR/UV mixing Igor Dmitriyevich Novikov India-based Neutrino Observatory Induced gravity Infinite derivative gravity Interaction picture Interior Schwarzschild metric International Journal of Modern Physics A International Journal of Theoretical Physics Internet Encyclopedia of Philosophy Interpretations of quantum mechanics Introduction to general relativity Introduction to quantum mechanics Jackiw–Teitelboim gravity Jacques Distler Jean Zinn-Justin John Archibald Wheeler John Francis Donoghue (physicist)John Henry Schwarz Joseph Hooton Taylor Jr.Joseph Polchinski Jürgen Ehlers Kaluza–Klein theory Karl Schwarzschild Kasner metric Kerr metric Kerr–Newman metric Kip Thorne Klein–Gordon equation LIGO LIGO Scientific Collaboration LISA Pathfinder Laboratori Nazionali del Gran Sasso Ladder paradox Large Hadron Collider Le Sage's theory of gravitation Lecture Notes in Physics Lee Smolin Lemaître–Tolman metric Length contraction Lense–Thirring precession Lie superalgebra Light cone Linearized gravity Liouville gravity List of contributors to general relativity List of quantum gravity researchers List of textbooks on relativity List of unsolved problems in physics Little string theory Living Reviews in Relativity Local hidden-variable theory Loop quantum gravity Lorentz covariance Lorentz transformation Lovelock theory of gravity M-theory MacDowell–Mansouri action Mach's principle Mach–Zehnder interferometer Magnetic field Majorana equation Many-worlds interpretation Mass in special relativity Massive gravity Mass–energy equivalence Mathematical formulation of quantum mechanics Mathematical formulation of the Standard Model Mathematics of general relativity Matrix mechanics Maxwell's equations Measurement in quantum mechanics Measurement problem Mechanical explanations of gravitation Melvin metric Messenger particle Messenger particles Michael Duff (physicist)Michael Green (physicist)Milne model Minimal Supersymmetric Standard Model Minkowski diagram Minkowski space Minkowski spacetime Modern Physics Letters A Modified Newtonian dynamics Multiverse Nanotechnology Nature (journal)Neutrino Neutrino oscillation Newton's law of universal gravitation Newtonian mechanics Next-to-Minimal Supersymmetric Standard Model Non-perturbative Noncommutative geometry Noncommutative quantum field theory Noncommutative standard model Nonrenormalizable Nonsymmetric gravitational theory Nordström's theory of gravitation Normal mode Numerical relativity Objective-collapse theory Old quantum theory Orders of magnitude (length)Oxford University Press Ozsváth–Schücking metric Parameterized post-Newtonian formalism Particle accelerator Particle physics Path integral formulation Pauli equation Penrose diagram Penrose interpretation Perturbation theory Phase-space formulation Phenomenological quantum gravity Photon Physical Review Physical Review A Physical Review D Physical Review Letters Physics Letters B Physics beyond the Standard Model Physics in the medieval Islamic world Planck epoch Planck length Planck scale Planck units Poincaré gauge theory Point particle Poisson's equation Popper's experiment Pp-wave spacetime Princeton University Press Principle of locality Principle of relativity Problem of time Progress of Theoretical Physics Supplement Proper acceleration Proper length Proper time Pulsar timing array Quadratic gravity Quanta Magazine Quantum Bayesianism Quantum Field Theory in a Nutshell Quantum algorithm Quantum amplifier Quantum biology Quantum bus Quantum cellular automaton Quantum channel Quantum chaos Quantum chemistry Quantum chromodynamics Quantum circuit Quantum complexity theory Quantum computing Quantum cosmology Quantum cryptography Quantum decoherence Quantum differential calculus Quantum dynamics Quantum electrodynamics Quantum engineering Quantum entanglement Quantum eraser experiment Quantum error correction Quantum field theory Quantum field theory in curved spacetime Quantum finite automaton Quantum fluctuation Quantum fluctuations Quantum foam Quantum geometry Quantum graphity Quantum image processing Quantum imaging Quantum information Quantum jump Quantum key distribution Quantum logic Quantum logic gate Quantum machine Quantum machine learning Quantum mechanics Quantum metamaterial Quantum metrology Quantum mind Quantum mysticism Quantum network Quantum neural network Quantum nonlocality Quantum operator Quantum optics Quantum programming Quantum sensor Quantum simulator Quantum spacetime Quantum state Quantum statistical mechanics Quantum stochastic calculus Quantum superposition Quantum teleportation Quantum tunnelling Quark confinement Quark model RST model Rafael Sorkin Rainbow gravity theory Rainer Weiss Rapidity Rarita–Schwinger equation Raychaudhuri equation Regge calculus Reissner–Nordström metric Relational quantum mechanics Relational theory Relativistic Doppler effect Relativistic disk Relativistic quantum mechanics Relativity of simultaneity Renormalization Renormalization group Reports on Progress in Physics Reviews of Modern Physics Riemannian geometry Robert Geroch Robert Kraichnan Roger Penrose Roy Kerr Russell Alan Hulse Rydberg formula Ryu–Takayanagi conjecture Scalar theories of gravitation Scalar–tensor theory Scalar–tensor–vector gravity Scattering Scholarpedia Schrödinger's cat Schrödinger's cat in popular culture Schrödinger equation Schrödinger picture Schwarzschild metric Semiclassical gravity Shape dynamics Shapiro time delay Shing-Tung Yau Space-time Space-time foam Spacetime Special relativity Speed of light Spin foam Spin network Spinfoam Split supersymmetry Spontaneous symmetry breaking Standard Model Stanford Encyclopedia of Philosophy Stanley Deser Stephen Hawking Stern–Gerlach experiment Steve Carlip Steven Weinberg String-net String (physics)String landscape String theory Strong interaction Subatomic particle Subrahmanyan Chandrasekhar Sudbury Neutrino Observatory Super-Kamiokande Superdeterminism Superfluid vacuum theory Supergravity Superstring theory Supersymmetry Suraj N. Gupta Swampland (physics)Symmetry in quantum mechanics Taub–NUT space Technicolor (physics)Teleparallelism Tensor–vector–scalar gravity Terrell rotation Tests of general relativity Tevatron Theoretical physics Theory of everything Theory of impetus Theory of relativity Thomas precession Thought experiment Three Roads to Quantum Gravity Time dilation Timeline of quantum computing and communication Timeline of quantum mechanics Tolman–Oppenheimer–Volkoff equation Topological quantum field theory Toy model Trans-Planckian problem Transactional interpretation Translation operator (quantum mechanics)Twin paradox Twistor string theory Twistor theory Two-body problem in general relativity Type 0 string theory Type II string theory Type I string theory UV fixed point Uncertainty principle Unification of theories in physics Universe University of Oregon Unruh effect Vacuum energy Van Stockum dust Virgo interferometer Virtual black hole W. W. Norton & Company Wave function Wave function collapse Wave interference Wave–particle duality Weak Gravity Conjecture Weak hypercharge Weak interaction Weak isospin Weinberg–Witten theorem Weyl equation Weyl−Lewis−Papapetrou coordinates Wheeler's delayed-choice experiment Wheeler–DeWitt equation Whitehead's theory of gravitation Wigner's friend Willem de Sitter World Scientific World line World sheet Yakov Zeldovich Yvonne Choquet-Bruhat Zero-point energy

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