1303.6058 (Zhe Chang et al.)

Inflation and primordial power spectra at anisotropic spacetime inspired
by Planck's constraints on isotropy of CMB    [PDF]

Zhe Chang, Sai Wang

The recently released Planck 2013 results show that the primordial fluctuations are deviated from isotropy. The deviations from isotropy are robust against component separation algorithm, mask and frequency dependence. To incorporate the Planck's data into standard cosmological model, we propose an inflation of the very early universe in an anisotropic spacetime. A generalized Friedmann-Robertson-Walker (FRW) metric is presented in the Randers-Finsler spacetime. By employing the osculating Rieammian metric approach, we obtain the primordial power spectra of the scalar perturbation with direction dependence. This is in good agreement with the deviations from isotropy of the universe found by the Planck satellite.

View original: http://arxiv.org/abs/1303.6058