Local Observables in a Landscape of Infrared Gauge Modes
arXiv:1311.3302 · doi:10.1016/j.physletb.2014.04.028
Abstract
Cosmological local observables are at best statistically determined by the fundamental theory describing inflation. When the scalar inflaton is coupled uniformly to a collection of subdominant massless gauge vectors, rotational invariance is obeyed locally. However, the statistical isotropy of fluctuations is spontaneously broken by gauge modes whose wavelength exceed our causal horizon. This leads to a landscape picture where primordial correlators depend on the position of the observer. We compute the stochastic corrections to the curvature power spectrum, show the existence of a new local observable (the shape of the quadrupole), and constrain the theory using Planck limits.
5 pages, 3 figures, v2: minor updates, matches version published in Physics Letters B
References in corpus (6)
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Cited by in corpus (7)
- A cosmological open quantum system
- Cosmic variance in inflation with two light scalars
- Statistics of Anisotropies in Inflation with Spectator Vector Fields
- General quadrupolar statistical anisotropy: Planck limits
- Revisiting constraints on (pseudo)conformal Universe with Planck data
- Non-local bispectra from super cosmic variance
- On the space of non-Gaussian fields with single-clock bispectra