paper

Circular Semiclassical String Solutions on AdS_5 x S_5

arXiv:hep-th/0209047 · doi:10.1016/S0550-3213(02)00966-5

Abstract

We discuss two semiclassical string solutions on AdS_5\times S_5. In the first case, we consider a multiwrapped circular string pulsating in the radial direction of AdS_5, but fixed to a point on the S_5. We compute the energy of this motion as a function of a large quantum number . We identify the string level with , where is the number of string wrappings. Using the AdS/CFT correspondence, we argue that the bare dimension of the corresponding gauge invariant operator is and that its anomalous dimension scales as λ^{1/4}\sqrt{mn}, for large . Next we consider a multiwrapped circular string pulsating about two opposite poles of the . We compute the energy of this motion as a function of a large quantum number, where again the string level is given as . We find that the dimension of the corresponding operator is 2n(1+f(m^2λ/(2n)^2)), where f(x) is computible as a series about x=0 and where it is analytic. We also compare this result to the BMN result for large J operators.

15 pages, LaTeX;v3 minor error fixed;v4 reference added, sec 4 clarified and expanded slightly; v5 corrected a term in 4.12 and 4.13

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