paper

Semiclassical quantization of rotating superstring in AdS_5 x S^5

arXiv:hep-th/0204226 · doi:10.1088/1126-6708/2002/06/007

Abstract

Motivated by recent proposals in hep-th/0202021 and hep-th/0204051 we develop semiclassical quantization of superstring in . We start with a classical solution describing string rotating in and boosted along large circle of . The energy of the classical solution is a function of the spin and the momentum (R-charge) which interpolates between the limiting cases S=0 and J=0 considered previously. We derive the corresponding quadratic fluctuation action for bosonic and fermionic fields from the GS string action and compute the string 1-loop (large $λ= {R^4\over \a'^2}$) correction to the classical energy spectrum in the sector. We find that the 1-loop correction to the ground-state energy does not cancel for non-zero . For large it scales as , i.e. as the classical term, with no higher powers of appearing. This supports the conjecture made in hep-th/0204051 that the classical scaling can be interpolated to weak coupling to reproduce the corresponding operator anomalous dimension behaviour in gauge theory.

harvmac, 35p. v2,3: minor corrections; v4: added remarks about higher-loop corrections in section 4 and an argument suggesting the absence of higher than log S corrections to the energy to all orders in string tension in section 6.1; v5: factor 1/2 misprints corrected in eqs. (6.6) and (6.8) and thus in (6.5) and (6.9)

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