Supersymmetric compactifications of heterotic strings with fluxes and condensates

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We discuss supersymmetric compactifications of heterotic strings in the presence of H-flux and general condensates using the formalism of G-structures and intrinsic torsion. We revisit the examples based on nearly-Kaehler coset spaces and show that supersymmetric solutions, where the Bianchi identity is satisfied, can be obtained when both gaugino and dilatino condensates are present.
27 pages; v3 final version to appear in Nucl. Phys. B

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