Scalar Perturbation Spectra in an Emergent Cosmological Island

Details Scalar Perturbation Spectra in an Emergent Cosmological Island Scalar Perturbation Spectra in an Emergent Cosmological Island

2005-12-29

arxiv.org/abs/gr-qc/0512161v2

Phys.Rev. D74 (2006) 043509

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 1 eps figure, typos corrected, more comments and clarifications are added according to the suggestions of referees, t

Scientific paper

10.1103/PhysRevD.74.043509

The possibility that the universe may have a fundamental and positive cosmological constant has motivated an interesting cosmological model, in which initially the universe is in a cosmological constant sea, then the local quantum fluctuations violating the null energy condition create some islands with matter and radiation, which under certain conditions might corresponds to our observable universe. We in this note study the perturbation spectra of scalar fields not affecting the evolution of background during the fluctuation. We will examine whether they can be interesting, and responsible for the structure formation of observable universe.

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