Constraining the initial conditions of the Universe using large scale structure

  title={Constraining the initial conditions of the Universe using large scale structure},
  author={Nishant Agarwal and Shirley Ho and Sarah Shandera},
  journal={Journal of Cosmology and Astroparticle Physics},
Primordial non-Gaussianity induces a scale-dependent bias in large scale structure (LSS) data, proportional to fNL/k2 for the exact local ansatz. Recent work has shown that models of inflation that predict a large squeezed limit bispectrum, such as multi-field models and single field inflation with a modified initial state, typically give rise to a generalized local ansatz, with the scale-dependent bias now proportional to NL/kα. We use photometric measurements of the angular power spectrum of… 

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