Supersymmetric compactifications of heterotic strings with fluxes and   condensates
  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. 
Pantelis Manousselis, Nikolaos Prezas, George Zoupanos