“…We analyze the process of string vacuum destabilization due to instanton induced superpotential couplings which depend linearly on charged fields. …”
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“…To smooth out dislocations and the UV noise we cool the configurations with an action which has scale invariant instanton solutions for instanton size above about 2.3 lattice spacings. …”
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“…The microscopic mechanism ensuring this continuity involves novel contributions to the superpotential: As an instanton becomes unstable against decay to several instantons, the latter provide a multi-instanton contribution which reconstructs that of the single-instanton before decay. …”
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“…Here we apply this method to study topological properties of lattice gauge theories where it allows to retain instanton--anti-instanton pairs.…”
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“…The asymptotic large-order growth of the one-instanton sector unveils the presence of resonance, i.e., each instanton action is necessarily joined by its symmetric contribution. …”
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“…Moreover, in presence of supersymmetry breaking background fluxes, such instanton configurations induce new couplings in the 4-dimensional effective action, including non-perturbative contributions to the cosmological constant and non-supersymmetric mass terms.…”
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“…We extend the discussion of mirror symmetry, Picard-Fuchs equations, instanton corrected Yukawa couplings and the topological one loop partition function to the case of complete intersections with higher dimensional moduli spaces. …”
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“…We use string duality to describe instanton induced spontaneous supersymmetry breaking in string compactifications with additional background fields. …”
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“…The error inherent in the instanton approximation is found to be relatively small and similar in magnitude to that introduced by using fitted surfaces. …”
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“…By explicitly computing the one-instanton suppression factor in the weakly coupled phase, we also show that the transition is triggered by instanton effects. …”
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“…They also shed light on the relation between Dp-branes and D-(p-2)branes, D-strings and (p,q) strings, instanton sums and soliton loops. The latter interpretation takes over in D<=6 in order to account for the e^{-1/g^2} effects, still mysterious from the point of view of instanton calculus. …”
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“…--HTML--><p>Topological string theory has (spacetime) instanton sectors, which the resurgence theory predicts to be completely controlled by the perturbative free energy via Stokes transformations. …”
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“…Our model involves the generalized octonionic or SU(4) instanton equations defined in eight dimensions for a supersymmetric U(N) Yang--Mills field living on a special holonomy manifold. …”
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“…Since conformal invariance is broken in the non-critical string theory, monopole and antimonopole, or instanton and anti-instanton, are not separable, and the…”
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“…It is shown how such terms can be computed and we give a few examples of holomorphic couplings that arise from a D-brane instanton effect in string theory. Some of these instanton configurations give rise to phenomenologically desirable couplings although they do not admit an obvious interpretation in terms of standard gauge theory. …”
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“…We compute the Yukawa couplings and their expansions in terms of instantons of genus zero. By making use of recent results of Bershadsky et al. we compute also the instanton numbers for instantons of genus one. …”
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“…We propose a microscopic interpretation in terms of a gas of closed membranes for the instanton corrections to the entropy.…”
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“…Recently Alday and Tachikawa proposed a relation between conformal blocks in a two-dimensional theory with affine sl(2) symmetry and instanton partition functions in four-dimensional conformal N=2 SU(2) quiver gauge theories in the presence of a certain surface operator. …”
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“…CP/sup n-1/ models have stable instanton solutions to the Euclidean equations of motion for all n, and so show some similarities to Yang- Mills theories. …”
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“…This work addresses nonperturbative effects in both matrix models and topological strings, and their relation with the large-order behavior of perturbation theory. We study instanton configurations in generic one-cut matrix models, obtaining explicit results for the one-instanton amplitude at both one and two loops. …”
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