Non-critical string theory: Difference between revisions

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The '''non-critical string theory''' describes the relativistic string without enforcing the critical dimension. Although this allows the construction of a string theory in 4 spacetime dimensions, such a theory does not describe a Lorentz invariant background. Thus it is not a suitable [[theory of everything]].

However, there are several applications of the non-critical string. Through the [[AdS/CFT correspondence]] it provides a holographic description of gauge theories which are asymptotically free.{{Fact|date=February 2007}} It may then have applications to the study of the [[Quantum chromodynamics|QCD]], the theory of strong interactions between [[quarks]]. Another area of much research is two-dimensional string theory which provides simple toy models of [[string theory]]. There also exists a [[duality]] to the 3-dimensional [[Ising model]].{{Fact|date=February 2007}}

== The Critical Dimension and Central Charge ==