Seiberg-Witten theory for a non-trivial compactification from five to four dimensions

The prepotential and spectral curve are described for a smooth interpolation between an enlarged N=4 SUSY and ordinary N=2 SUSY Yang-Mills theory in four dimensions, obtained by compactification from five dimensions with non-trivial (periodic and antiperiodic) boundary conditions. This system provides a new solution to the generalized WDVV equations. We show that this exhausts all possible solutions of a given functional form.Comment: 10 pages, LaTeX, 2 figures using emlines.st

Quasiclassical Geometry and Integrability of AdS/CFT Correspondence

We discuss the quasiclassical geometry and integrable systems related to the gauge/string duality. The analysis of quasiclassical solutions to the Bethe anzatz equations arising in the context of the AdS/CFT correspondence is performed, compare to stationary phase equations for the matrix integrals. We demonstrate how the underlying geometry is related to the integrable sigma-models of dual string theory, and investigate some details of this correspondence.Comment: Based on talks at the conferences "Classical and quantum integrable systems", January 2004, Dubna, and "Quarks-2004", May 2004, Pushkinskie Gory, Russia; LaTeX, 17 pp, 3 figures; references adde

SUSY gauge theories and Whitham integrable systems from compactification and SUSY breaking

We review the Seiberg-Witten construction of low-energy effective actions and BPS spectra in SUSY gauge theories and its formulation in terms of integrable systems. It is also demonstrated how this formulation naturally appears from the compactified version of the theory with partially broken supersymmetry so that the integrable structures arise from the relation between bare and quantum variables and superpotentials of SUSY gauge theories. The Whitham integrable systems, literally corresponding to the uncompactified theory, are then restored by averaging over fast variables in the decompactification limit.Comment: Contribution to the proceedings of the workshop "Gauge Theory and Integrable Systems", YITP, Kyoto, 26-29 January, 1999; 13pp, LaTe

Associativity Equations in Effective SUSY Quantum Field Theories

The role of associativity or WDVV equations in effective supersymmetric quantum theories is discussed and it is demonstrated that for wide class of their solutions when residue formulas are valid the proof of associativity equations can be reduced to solving the system of ordinary linear equations and depends only upon corresponding matching and nondegeneracy conditions. The covariance of WDVV equations upon generic duality transformations and the role of associativity equations in general context of quasiclassical integrable systems is also discussed.Comment: Contribution to the proceedings of the conference SUSY01, Dubna, June 2001; LaTeX, 8 p

Exact solutions to quantum field theories and integrable equations

The exact solutions to quantum string and gauge field theories are discussed and their formulation in the framework of integrable systems is presented. In particular I consider in detail several examples of appearence of solutions to the first-order integrable equations of hydrodynamical type and stress that all known examples can be treated as partial solutions to the same problem in the theory of integrable systems.Comment: revised version, some details and formulations are changed, few references added; LaTeX, 12 p

Non-perturbative Quantum Theories and Integrable Equations

I review the appearance of classical integrable systems as an effective tool for the description of non-perturbative exact results in quantum string and gauge theories. Various aspects of this relation: spectral curves, action-angle variables, Whitham deformations and associativity equations are considered separately demonstrating hidden parallels between topological 2d string theories and naively non-topological 4d theories. The proofs are supplemented by explicit illustrative examples.Comment: 35 pages, LaTeX, to appear in Int.J.Mod.Phys.