Gerard 't Hooft at Harvard University

Gerardus ("Gerard") 't Hooft [ut-hooft] (The prefix ’t is pronounced as ‘ut’ and stands for ‘het’) (born July 5, 1946) is a professor in theoretical physics at Utrecht University, The Netherlands. He is a 1999 Nobel Prize laureate "for elucidating the quantum structure of electroweak interactions in physics". Asteroid 9491 Thooft is named in his honor; he has written a constitution for its future inhabitants. Download high resolution version (960x1280, 131 KB)Gerard t Hooft at Harvard University File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Download high resolution version (960x1280, 131 KB)Gerard t Hooft at Harvard University File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Jump to: navigation, search July 5 is the 186th day of the year (187th in leap years) in the Gregorian Calendar, with 179 days remaining. ... Jump to: navigation, search 1946 was a common year starting on Tuesday. ... Utrecht University (Universiteit Utrecht in Dutch) is a university in Utrecht, The Netherlands. ... The Netherlands (Dutch: Nederland) is the European part of the Kingdom of the Netherlands (Dutch: Koninkrijk der Nederlanden). ... Jump to: navigation, search Sir Edward Appletons medal Photographs of Nobel Prize Medals. ... Asteroid 9491 Thooft is named for 1999 Nobel physics laureate Gerardus t Hooft. ...

Important discoveries

• A proof that gauge theories are renormalizable
• Other results about gauge theory, confinement, and anomalies
• The topological expansion of large N gauge theories that was recently proved important in the AdS/CFT correspondence in string theory
• 't Hooft magnetic loop (related to Wilson loop by S-duality)
• Instanton contributions to interactions of fermions ('t Hooft interaction)
• Holographic principle (with Lenny Susskind) and other proposals about quantum gravity
• Recent attempts to revive hidden variables in quantum mechanics

Gauge theories are a class of physical theories based on the idea that symmetry transformations can be performed locally as well as globally. ... In physics, the adjective renormalizable refers to a theory (usually a quantum field theory) in which all ultraviolet divergences, infinities and other seemingly meaningless results can be cured by the process of renormalization. ... Gauge theories are a class of physical theories based on the idea that symmetry transformations can be performed locally as well as globally. ... This article is about a particle physics phenomenon. ... Jump to: navigation, search An anomaly is a deviation from the common rule. ... Jump to: navigation, search Topology (Greek topos, place and logos, study) is a branch of mathematics concerned with spatial properties preserved under bicontinuous deformation (stretching without tearing or gluing); these are the topological invariants. ... In physics, the AdS/CFT correspondence is the equivalence between a string theory or supergravity defined on some sort of Anti de Sitter space and a conformal field theory defined on its boundary whose dimension is lower by one. ... Jump to: navigation, search 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. ... In gauge theory, a Wilson loop is a gauge-invariant observable obtained from the holonomy of the gauge connection around a given loop. ... In theoretical physics, S-duality (also a strong-weak duality) is an equivalence of two quantum field theories, string theories, or M-theory. ... In quantum field theory, an instanton is a topologically nontrivial field configuration in four-dimensional Euclidean space (considered as the Wick rotation of Minkowski spacetime). ... Interaction is a kind of action which occurs as two or more objects have an effect upon one another. ... Fermions, named after Enrico Fermi, are particles which form totally-antisymmetric composite quantum states. ... The holographic principle is a speculative conjecture about quantum gravity theories, proposed by Gerard t Hooft and improved and promoted by Leonard Susskind, claiming that all of the information contained in a volume of space can be represented by a theory that lives in the boundary of that region. ... Categories: Stub ... Quantum gravity is the field of theoretical physics attempting to unify the theory of quantum mechanics, which describes three of the fundamental forces of nature, with general relativity, the theory of the fourth fundamental force: gravity. ... In physics, a hidden variable theory is urged by a minority of physicists who argue that the statistical nature of quantum mechanics implies that quantum mechanics is incomplete; it is really applicable only to ensembles of particles; new physical phenomena beyond quantum mechanics are needed to explain an individual event. ... Jump to: navigation, search Fig. ...

See also

• 't Hooft-Polyakov monopole

In theoretical physics, the t Hooft-Polyakov monopole is a topological soliton similar to the Dirac monopole but without any singularities. ...

External links

• Nobel Archive 1999
• Homepage G. 't Hooft