Strong Interaction and Strings - Part 2

Description
The physics of strong interaction is described by quantum chromodynamics (QCD), which has the peculiar property of being weakly coupled at high energy and strongly coupled at low energy. This has forbidden understanding the structure of hadrons and their interactions at low energy from the fundamental point of view. Also, discovery of strongly coupled quark gluon plasma (sQGP), instead of a weakly coupled gas of quarks and gluons, in heavy ion colliders has smashed all hopes of applying perturbative QCD in such systems. We need a formalism to understand strongly coupled physics. Recently, ideas from string theory, namely gauge-gravity duality, has given such a framework for understanding gauge theories in strongly coupled regime through its dual, a higher dimensional gravity theory in weakly coupled regime. We plan to discuss a general setup for understanding the physics of strong interaction in the gauge gravity model, giving introduction to QCD and string theory.