A mathematical theory for describing the properties of fundamental particles, which represents the particles as one-dimensional string-like objects, which exist in the normal four dimensions of space-time plus additional dimensions, the total dimensions being ten, eleven, or twenty-six depending on the version of the theory. The properties of fundamental particles in string theory and their manner of interaction with each other depend upon the modes of vibration of the strings{17}. The attractiveness of this theory rests in part on its ability to provide a unified treatment of gravity as well as the three other basic forces of nature, in a manner consistent with quantum mechanics. The great difficulty of doing the calculations required by the theory, however, has thus far (1999) made it impossible to calculate the observable properties, such as the mass, of known particles, such as the electron, proton, mesons, quarks, and neutron; thus there is as yet no experimental verification for the theory. The most popular version of the theory depends on a mathematical property called supersymmetry, and the theory derived form this principle is properly called superstring theory, a term which is often used interchangeably with string theory. See also string{17}.
A proposed Quantum Gravity Theory that states that on a subatomic scale, particles are actually long extended strings and the "particles" we recognize are simply excitations of that string as it moves through spacetime. The "particle interactions" that we see are simply the joining and splitting of the strings. A D-brane is a type of surface structure in space-time where strings can begin and end.
A theory that seeks to incorporate a quantum theory of gravity into the Standard Model. In this theory, the fundamental constituents of matter are not particles, but strings. The particles that are observed are manifestations of the vibrations of fundamental strings.
unified theory of the universe postulating that fundamental ingredients of nature are not zero-dimensional point particles but tiny one-dimensional filaments called strings. String theory harmoniously unites quantum mechanics and general relativity, the previously known laws of the small and the large, that are otherwise incompatible. Often short for superstring theory.
A potential formulation of quantum gravity, which assumes that the fundamental building units of nature are one-dimensional strings.
a physical model whosefundamental building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles)that were the basis of most earlier physics
A theory of physics in which particles are described as waves on strings. Strings have length but no other dimension.
A theory of physics taking the String as its fundamental object. This theory attempts to solve problems in standard Quantum Mechanics and Quantum Field Theory. It actually predicts the existence of gravity.
depicts particles as little pieces of string, with characteristic length of the order of the Planck length (10-35 m), - either open ended or in closed loops. Different particle types correspond to the different modes of vibration and rotation of a string.
A description of physical reality in which the fundamental entities are not particles but tiny string-like loops. Different oscillations of the loops correspond to what we now consider different "elementary" particles. Sting theory is a leading candidate for a "theory of everything".
a premise in physics that all elementary particles are manifestations of the vibrations of one-dimensional stings.
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. The phrase is often used as shorthand for Superstring theory. String theorists are attempting to adjust the Standard Model by removing the assumption in quantum mechanics that particles are point-like.
String Theory is a trilogy of novels set in the Star Trek universe. Book one, Cohesion, was written by Jeffrey Lang; book two, Fusion, by Kirsten Beyer; and book three, Evolution, by Heather Jarman. The story takes place between seasons four and five of the Star Trek: Voyager television series (i.e. between episodes Hope and Fear and Night).
String Theory was an electronic music band from Chicago that existed from 1997 until 2005. The members were Joshua R. Davison and Nathan T.