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Ivancevic_Applied-Diff-Geom

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792 <strong>Applied</strong> <strong>Diff</strong>erential <strong>Geom</strong>etry: A Modern IntroductionThe prepotential and other ‘physical’ quantities are defined in terms ofthe cohomology class of dS:∮a i = dS, a D i ≡ ∂F ∮= dS, A I ◦ B J = δ IJ . (4.304)A i∂a i B iThe first identity defines here the appropriate flat moduli, while the secondone – the prepotential. The derivatives of the generating differential dSgive holomorphic 1–differentials:∂dS∂a i= dω i (4.305)and, therefore, the second derivative of the prepotential is the period matrixof the curve C:∂ 2 F∂a i ∂a j= T ij .The latter formula allows one to identify prepotential with logarithm of theτ−function of Whitham hierarchy: F = log τ.So far we reckoned without massive hypermultiplets. In order to includethem, one just needs to consider the surface C with punctures. Then, themasses are proportional to residues of dS at the punctures, and the modulispace has to be extended to include these mass moduli. The correspondencebetween SYM theories and integrable systems is built through the SWconstruction in most of known cases that are collected in the followingtable [Mironov (1998)].SUSY 4D pure gauge 4D SYM with 4D SYM with 5d pure gaugephysical SYM theory, fundamental adjoint matter SYM theorytheory gauge group G matterUnderlying Toda chain Rational Calogero–Moser Relativisticintegrable for the dual spin chain system Toda chainsystem affine Ĝ∨ of XXX typeBarespectral sphere sphere torus spherecurveDressedspectral hyper–elliptic hyper–elliptic non-hyper–elliptic hyper–ellipticcurveGeneratingmeromorphic1–form dSλ dw wλ dw wλ dx ylog λ dw wCorrespondence: SUSY gauge theories ⇐⇒ integrable systems

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