TY  - JOUR
VL  - 82
PB  - American Physical Society
JF  - Physical Review D
UR  - http://link.aps.org/doi/10.1103/PhysRevD.82.023528
A1  - Saracco, Fabio
A1  - Pietroni, M.
A1  - Tetradis, N.
A1  - Pettorino, V.
A1  - Robbers, G.
Y1  - 2010/07//
TI  - Nonlinear matter spectra in coupled quintessence
N2  - 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.
ID  - eprints2905
SN  - 1550-7998
AV  - public
ER  -