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A Classical Treatment of Island Cosmology

Sourish Dutta
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Abstract

Computing the perturbation spectrum in the recently proposed Island Cosmology remains an open problem. In this paper we present a classical computation of the perturbations generated in this scenario by assuming that the NEC-violating field behaves as a classical phantom field. Using an exactly-solvable potential, we show that the model generates a scale-invariant spectrum of scalar perturbations, as well as a scale-invariant spectrum of gravitational waves. The scalar perturbations can have sufficient amplitude to seed cosmological structure, while the gravitational waves have a vastly diminished amplitude.

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Sourish Dutta. 2005-11-04. A Classical Treatment of Island Cosmology. https://doi.org/10.1103/physrevd.73.063524

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