Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-05-21
Mod.Phys.Lett.A22:915-930,2007
Physics
High Energy Physics
High Energy Physics - Theory
16 pages; Seminar review written for the `Brief Reviews' section of Mod. Phys. Lett. A: [http://www.worldscinet.com/mpla/mpla.
Scientific paper
10.1142/S0217732307023614
Marginal beta deformations of N=4 super-Yang-Mills theory are known to correspond to a certain class of deformations of the S^5 background subspace of type IIB string theory in AdS_5 x S^5. An analogous set of deformations of the AdS_5 subspace is reviewed here. String energy spectra computed in the near-pp-wave limit of these backgrounds match predictions encoded by discrete, asymptotic Bethe equations, suggesting that the twisted string theory is classically integrable in this regime. These Bethe equations can be derived algorithmically by relying on the existence of Lax representations, and on the Riemann-Hilbert interpretation of the thermodynamic Bethe ansatz. This letter is a review of a seminar given at the Institute for Advanced Study, based on research completed in collaboration with McLoughlin.
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