Four-Impurity Operators and String Field Theory Vertex in the BMN Correspondence

Details Four-Impurity Operators and String Field Theory Vertex in the BMN Correspondence Four-Impurity Operators and String Field Theory Vertex in the BMN Correspondence

2004-06-07

arxiv.org/abs/hep-th/0406061v2

Phys.Rev. D71 (2005) 026001; Erratum-ibid. D71 (2005) 029902

Physics

High Energy Physics

High Energy Physics - Theory

25 pages, RevTeX; V2: Typos mended, references and comments added

Scientific paper

10.1103/PhysRevD.71.029902

In the context of the Penrose/BMN limit of the AdS/CFT correspondence, we consider four-impurity BMN operators in Yang-Mills theory, and demonstrate explicitly their correspondence to four-oscillator states in string theory. Using the dilatation operator on the gauge-theory side of the correspondence, we calculate matrix elements between four-impurity states. Since conformal dimensions of gauge-theory operators correspond to light-cone energies of string states, these matrix elements may be compared with the string-theory light-cone Hamiltonian matrix elements calculated in the plane-wave background using the string field theory vertex. We find that the two calculations agree, extending the cases of two- and three-impurity operators considered in the literature using BMN gauge-theory quantum mechanics. The results are also in agreement with calculations in the literature based on perturbative gauge-theory methods.

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