@article{eprints2905,
          volume = {82},
            year = {2010},
          author = {Fabio Saracco and M. Pietroni and N. Tetradis and V. Pettorino and G. Robbers},
         journal = {Physical Review D},
           title = {Nonlinear matter spectra in coupled quintessence},
           month = {July},
           pages = {023528},
       publisher = {American Physical Society},
        abstract = {We consider cosmologies in which a dark-energy scalar field interacts with cold dark matter. The growth of perturbations is followed beyond the linear level by means of the time-renormalization-group method, which is extended to describe a multicomponent matter sector. Even in the absence of the extra interaction, a scale-dependent bias is generated as a consequence of the different initial conditions for baryons and dark matter after decoupling. The effect is enhanced significantly by the extra coupling and can be at the 2\%?3\% level in the range of scales of baryonic acoustic oscillations. We compare our results with N-body simulations, finding very good agreement.},
             url = {http://eprints.imtlucca.it/2905/}
}