Leading quantum correction to energy of "short" spiky strings

Details Leading quantum correction to energy of "short" spiky strings Leading quantum correction to energy of "short" spiky strings

2012-01-24

arxiv.org/abs/1201.5033v1

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, LaTeX, JHEP style

Scientific paper

We consider semiclassical quantization of spiky strings spinning in AdS_3 part of AdS_5 X S^5 using integrability-based (algebraic curve) method. In the "short string" (small spin) limit the expansion of string energy starts with its flat-space expression. We compute the leading quantum string correction to "short" spiky string energy and find the explicit form of the corresponding 1-loop coefficient a_01. It turns out to be rational and expressed in terms of the harmonic sums as functions of the number n of spikes. In the special case of n=2 when the spiky string reduces to the single-folded spinning string the coefficient a_01 takes the value (-1/4) found in arXiv:1102.1040. We also consider a similar computation for the m-folded string and more general spiky string with an extra "winding" number, finding similar expressions for a_01. These results may be useful for a description of energies of higher excited states in the quantum AdS_5 X S^5 string spectrum, generalizing earlier discussions of the string counterparts of the Konishi operator.

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