Large non-Gaussian Halo Bias from Single Field Inflation

Abstract

We calculate Large Scale Structure observables for non-Gaussianity arising from non-Bunch-Davies initial states in single field inflation. These scenarios can have substantial primordial non-Gaussianity from squeezed (but observable) momentum configurations. They generate a term in the halo bias that may be more strongly scale-dependent than the contribution from the local ansatz. We also discuss theoretical considerations required to generate an observable signature.

30 pages, 14 figures, typos corrected and minor changes to match published version JCAP09(2012)007