BS2 - Scalar fields in cosmology |
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Speaker |
Vallejo Peña, Sergio Andrés |
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Coauthors |
Sasaki, Misao; Romano, Antonio E.; Naruko, Atsushi; |
| Talk Title |
The effects of anisotropy and non-adiabaticity on the evolution of the curvature perturbation |
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Abstract |
We derive a general equation for the evolution of the curvature perturbation on comoving slices $\mathcal{R}_c$ in the presence of anisotropic and non-adiabatic pressure terms in the energy-momentum tensor of matter field. The equation is obtained by manipulating the perturbed Einstein equations in the comoving slicing. It could be used to study the evolution of perturbations for a system with an anisotropic energy-momentum tensor, such as in the presence of a vector field or in the presence of non-adiabaticity, such as in a multi-field system. |
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