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Spectra of primordial fluctuations in two-perfect-fluid regular bounces · Around

2007

Spectra of primordial fluctuations in two-perfect-fluid regular bounces

Finelli, F., Peter, P., Pinto-Neto, N.

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We introduce analytic solutions for a class of two components bouncing models, where the bounce is triggered by a negative energy density perfect fluid.

The equation of state of the two components are constant in time, but otherwise unrelated.
By numerically integrating regular equations for scalar cosmological perturbations, we find that the (would be) growing mode of the Newtonian potential before the bounce never matches with the the growing mode in the expanding stage.
For the particular case of a negative energy density component with a stiff equation of state we give a detailed analytic study, which is in complete agreement with the numerical results.

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F. Finelli, unpublished (2003)

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