Quantum cosmological origin of large scale structures of the universe

Details Quantum cosmological origin of large scale structures of the universe Quantum cosmological origin of large scale structures of the universe

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989qcol.book.....a&link_type=abstract

Unknown

Physics

Cosmology, Field Theory (Physics), Quantum Theory, Scalars, Universe

Scientific paper

The initial quantum state of matter perturbations about de Sitter minisuperspace model is found. For a large class of boundary conditions (bcs), including those of Hartle-Hawking and Vilenkin, the resulting quantum state is the de Sitter invariant vacuum. This result is found to depend only on the regularity requirement at the euclidean origin of spacetime which is common to all reasonable (bcs). The initial value of the density perturbations implied by these quantum fluctuations are found and evaluated at the initial horizon crossing. The perturbations are found to have an almost scale independent spectrum, and an amplitude which depends on the scale at which inflation took place. The amplitude would have the right value if the scale of inflation is H less than or = 1015GeV.

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