Abstract
We discuss quantum fluctuations of a class of rotating strings in AdS 5 × S 5. In particular, we develop a systematic method to compute the one-loop sigma-model effective actions in closed forms as expansions for large spins. As examples, we explicitly evaluate the leading terms for the constant radii strings in the SO (6) sector with two equal spins, the SU (2) sector, and the SL (2) sector. We also obtain the leading quantum corrections to the space–time energy for these sectors.
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