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arXiv · 1408.1955

Holography for a Non-Inflationary Early Universe

Kurt Hinterbichler·James Stokes·Mark Trodden
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Abstract

We construct a gravitational dual of the pseudo-conformal universe, a proposed alternative to inflation in which a conformal field theory in nearly flat space develops a time dependent vacuum expectation value. Constructing this dual amounts to finding five-dimensional domain-wall spacetimes with anti-de Sitter asymptotics, for which the wall has the symmetries of four-dimensional de Sitter space. This holographically realizes the characteristic symmetry breaking pattern O(2,4) to O(1,4) of the pseudo-conformal universe. We present an explicit example with a massless scalar field, using holographic renormalization to obtain general expressions for the renormalized scalar and stress-tensor one-point functions. We discuss the relationship between these solutions and those of four-dimensional holographic defect conformal field theories which break O(2,4) to O(2,3)

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Kurt Hinterbichler, James Stokes, Mark Trodden. 2014-08-08. Holography for a Non-Inflationary Early Universe. https://doi.org/10.1007/jhep01(2015)090

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