String theory

String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that are the basis of the Standard Model of particle physics. For this reason, string theories are able to avoid problems associated with the presence of pointlike particles in a physical theory. Study of string theories has revealed that they require not just strings but other objects, variously including points, membranes, and higher-dimensional objects.

Related topics

• List of string theory topics
• Kaluza-Klein theory
• Superstring theory
• M-theory
• F-theory
• Conformal field theory
• Graviton
• Quantum gravity
• Loop quantum gravity
• Supergravity
• Supersymmetry
• Theory of everything