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Using the correspondence between gauge theories and string theory in curved backgrounds, we investigate aspects of the large N limit of non-commutative gauge theories by considering gravity solutions… (More)

A diagrammatic expansion of coefficients in the low-momentum expansion of the genus-one four-particle amplitude in type II superstring theory is developed. This is applied to determine coefficients… (More)

A bstractUsing exact results obtained from localization on S4, we explore the large N limit of $ \mathcal{N} $ = 2 super Yang-Mills theories with massive matter multiplets. We focus on three cases: $… (More)

We investigate a string model defined by a special plane-wave metric ds2 = 2dudv−λ(u)x2du2+dx2 with λ = k u and k=const > 0. This metric is a Penrose limit of some cosmological, Dp-brane and… (More)

We construct the totally antisymmetric structure constants f of a 3algebra with a Lorentzian bi-invariant metric starting from an arbitrary semisimple Lie algebra. The structure constants f can be… (More)

Superstring models describing curved 4-dimensional magnetic flux tube backgrounds are exactly solvable in terms of free fields. We first consider the simplest model of this type (corresponding to… (More)

This paper explores the moduli-dependent coefficients of higher derivative interactions that appear in the low-energy expansion of the four-supergraviton amplitude of maximally supersymmetric string… (More)

A bstractWe solve, using localization, for the large-N master field of $ \mathcal{N}={2^{*}} $ superYang-Mills theory. From that we calculate expectation values of large Wilson loops and the free… (More)