On matching conditions for cosmological perturbations

Details On matching conditions for cosmological perturbations On matching conditions for cosmological perturbations

1995-03-27

arxiv.org/abs/gr-qc/9503050v1

Phys.Rev.D52:5549-5555,1995

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, latex (revtex), no figures

Scientific paper

10.1103/PhysRevD.52.5549

We derive the matching conditions for cosmological perturbations in a Friedmann Universe where the equation of state undergoes a sharp jump, for instance as a result of a phase transition. The physics of the transition which is needed to follow the fate of the perturbations is clarified. We dissipate misleading statements made recently in the literature concerning the predictions of the primordial fluctuations from inflation and confirm standard results. Applications to string cosmology are considered.

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