We argue that the analysis of the $J\text{−}Q$ model, presented in Kotov et al. [Phys. Rev. B 80, 174403 (2009)] and based on a field-theory description of coupled dimers, captures properly the strong quantum fluctuations tendencies, and the objections outlined in Isaev et al. [preceding Comment, Phys. Rev. B 82, 136401 (2010)] are misplaced.

• Received 1 September 2010

DOI:https://doi.org/10.1103/PhysRevB.82.136402