Spin foam

Definition

In physics, the topological structure of spinfoam or spin foam consists of two-dimensional faces representing a configuration required by functional integration to obtain a Feynman's path integral description of quantum gravity. These structures are employed in loop quantum gravity as a version of quantum foam.

Related concepts

(2+1)-dimensional topological gravity 6D (2,0) superconformal field theory Accelerator Neutrino Neutron Interaction Experiment AdS/CFT correspondence Barrett–Crane model Batalin–Vilkovisky formalism Bekenstein bound Black hole Black hole complementarity Black hole information paradox Black hole thermodynamics Bosonic string theory Bousso's holographic bound Brane cosmology Brans–Dicke theory Bunch–Davies vacuum CA-duality CGHS model CPT symmetry CP violation Canonical quantum gravity Carlo Rovelli Causal dynamical triangulation Causal fermion system Causal fermion systems Causal patch Causal sets Cell complex Compact Muon Solenoid Connection (mathematics)Cosmic censorship hypothesis Cosmological constant problem Dark energy Dark fluid Dark matter Dark photon Dark radiation De Sitter invariant special relativity Differentiable manifold Doubly special relativity Dual graviton ER = EPR Eternal inflation Euclidean quantum gravity Extra dimensions F-theory FRW/CFT duality Face (geometry)Faddeev–Popov ghost False vacuum Feynman's path integral Feynman diagram Fifth force Firewall (physics)Functional integration Gauge gravitation theory Gauge theory gravity General covariance General relativity Grand Unified Theory Graph (discrete mathematics)Graviphoton Graviscalar Gravitational anomaly Gravitational singularity Gravitino Graviton Group field theory Hartle–Hawking proposal Hawking radiation Hierarchy problem Higgs boson Hilbert space Holographic principle Hypersurface IR/UV mixing India-based Neutrino Observatory Jackiw–Teitelboim gravity Jerzy Lewandowski Kaluza–Klein theory Laboratori Nazionali del Gran Sasso Large Hadron Collider Large extra dimensions Laurent Freidel Liouville gravity Loop quantum cosmology Loop quantum gravity Lorentz invariance in loop quantum gravity M-theory Manifold Massive gravity Mathematical universe hypothesis Minimal Supersymmetric Standard Model Mirror matter Multiverse NOvA N = 4 supersymmetric Yang–Mills theory Neutrino oscillation Next-to-Minimal Supersymmetric Standard Model Noncommutative geometry Noncommutative quantum field theory Phantom energy Physics Physics beyond the Standard Model Planck units Ponzano–Regge model Quantum cosmology Quantum field theory Quantum field theory in curved spacetime Quantum foam Quantum geometry Quantum gravity Quantum history Quintessence (physics)RST model Randall–Sundrum model Ryu–Takayanagi conjecture Second quantization Semiclassical gravity Spin network Standard Model String-net liquid String theory Sudbury Neutrino Observatory Super-Kamiokande Superfluid vacuum theory Supergravity Superstring theory Supersymmetry Supersymmetry breaking Technicolor (physics)Tevatron Theory of everything Topological Topological quantum field theory Topology Toy model Trans-Planckian problem Twistor string theory Twistor theory Unified field theory Unparticle physics Unruh effect Vertex (geometry)Weinberg–Witten theorem Wheeler–DeWitt equation

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