Igor Klebanov

Igor Klebanov

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Igor R. Klebanov is a theoretical physicist whose research is centered on relations between string theory
String theory
String theory is an active research framework in particle physics that attempts to reconcile quantum mechanics and general relativity. It is a contender for a theory of everything , a manner of describing the known fundamental forces and matter in a mathematically complete system...

 and quantum gauge field theory
Quantum field theory
Quantum field theory provides a theoretical framework for constructing quantum mechanical models of systems classically parametrized by an infinite number of dynamical degrees of freedom, that is, fields and many-body systems. It is the natural and quantitative language of particle physics and...

. Since 1989, he has been a Professor at Princeton University
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....

.

Born in Russia in 1962, he emigrated to the U.S. as a teenager. He received his undergraduate education at MIT (class of 1982), and his Ph.D. degree at Princeton University
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....

 as a student of Curtis Callan
Curtis Callan
Curtis Callan is a theoretical physicist and a professor at Princeton University. He has conducted research in gauge theory, string theory, instantons, black holes, strong interactions, and many other topics...

 in 1986.
In his thesis he made advances in the Skyrme model of hadron
Hadron
In particle physics, a hadron is a composite particle made of quarks held together by the strong force...

s.
Klebanov worked as a post-doc at SLAC.
His main contributions to string theory are in Matrix model
Matrix model
The term matrix model may refer to one of several concepts:* In theoretical physics, a matrix model is a system with matrix-valued physical quantities. See, for example, Lax pair....

 approaches to two-dimensional strings, in brane dynamics, and more recently in the gauge theory-gravity duality.
His work in 1996-97 on relations between branes in supergravity
Supergravity
In theoretical physics, supergravity is a field theory that combines the principles of supersymmetry and general relativity. Together, these imply that, in supergravity, the supersymmetry is a local symmetry...

 and their gauge theory
Gauge theory
In physics, gauge invariance is the property of a field theory in which different configurations of the underlying fundamental but unobservable fields result in identical observable quantities. A theory with such a property is called a gauge theory...

 description anticipated the gauge theory-gravity correspondence.

Klebanov's 1998 paper Gauge Theory Correlators from Non-Critical String Theory with his graduate student Gubser
Steven Gubser
Steven S. Gubser is a professor of physics at Princeton University. His research focuses on theoretical particle physics, especially string theory, and the AdS/CFT correspondence. He is a widely cited scholar in these and other related areas....

, and Polyakov, which made a precise statement of the AdS/CFT duality, is among the all-time top cited papers in high-energy physics.
A series of papers by Klebanov and collaborators on D-branes on the conifold
Conifold
In mathematics and string theory, a conifold is a generalization of a manifold. Unlike manifolds, conifolds can contain conical singularities i.e. points whose neighbourhoods look like cones over a certain base...

 has led to discovery of cascading gauge theory
Cascading gauge theory
In theoretical physics, a cascading gauge theory is a gauge theory whose coupling rapidly changes with the scale in such a way that Seiberg duality must be applied many times....

. Its dual warped throat provides a geometric description of color confinement and chiral symmetry breaking
Chiral symmetry breaking
In particle physics, chiral symmetry breaking is an example of spontaneous symmetry breaking affecting the chiral symmetry of gauge theory such as Quantum Chromodynamics. The origin may be described as a fermion condensate...

; it has been used in model building for cosmology and particle physics. The relation between 3-dimensional critical O(N) model and bosonic higher-spin gauge theory in 4-dimensional AdS space has been called the Klebanov-Polyakov correspondence.

Awards


Works


External links