Gravitational waves propagating through an oscillatory scalar condensate of metric origin acquire a modified, Whittaker-function profile and a non-standard dispersion relation, carrying an imprint of the alpha R squared curvature term.
Group field theory condensate cosmology: An appetizer
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This contribution is an appetizer to the relatively young and fast evolving approach to quantum cosmology based on group field theory condensate states. We summarize the main assumptions and pillars of this approach which has revealed new perspectives on the long-standing question of how to recover the continuum from discrete geometric building blocks. Among others, we give a snapshot of recent work on isotropic cosmological solutions exhibiting an accelerated expansion, a bounce where anisotropies are shown to be under control and inhomogeneities with an approximately scale-invariant power spectrum. Finally, we point to open issues in the condensate cosmology approach.
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Gravitational Wave Propagation in a Geometric Condensate in Starobinsky Cosmology
Gravitational waves propagating through an oscillatory scalar condensate of metric origin acquire a modified, Whittaker-function profile and a non-standard dispersion relation, carrying an imprint of the alpha R squared curvature term.