Rigid Calabi-Yau threefolds, Picard Eisenstein series and instantons

Details Rigid Calabi-Yau threefolds, Picard Eisenstein series and instantons Rigid Calabi-Yau threefolds, Picard Eisenstein series and instantons

2010-05-26

arxiv.org/abs/1005.4848v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, for the proceedings of Quantum Theories and Symmetries VI

Scientific paper

Type IIA string theory compactified on a rigid Calabi-Yau threefold gives rise to a classical moduli space that carries an isometric action of U(2,1). Various quantum corrections break this continuous isometry to a discrete subgroup. Focussing on the case where the intermediate Jacobian of the Calabi-Yau admits complex multiplication by the ring of quadratic imaginary integers O_d, we argue that the remaining quantum duality group is an arithmetic Picard modular group PU(2,1;O_d). Based on this proposal we construct an Eisenstein series invariant under this duality group and study its non-Abelian Fourier expansion. This allows the prediction of non-perturbative effects, notably the contribution of D2- and NS5-brane instantons. The present work extends our previous analysis in 0909.4299 which was restricted to the special case of the Gaussian integers O_1=Z[i].

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