The simplest models of inflation consist of a single, slowly rolling, scalar field. These models seed structure formation with a Gaussian spectrum of primordial density fluctuations. Any deviation from this simple picture, such as: multiple fields, derivative interactions, or features in the inflationary potential can lead to Non-Gaussianity (NG) in the spectrum of initial density perturbations and which manifests itself in cosmological observables. The NG Hub will bring together researchers from around the world to address all aspects of Non-Gaussianity; seeking to identify signatures of NG in current and planned experiments as well guiding the design of future experiments so that they are optimized to detect signatures of NG.
SPT and QUIET), center theorists, and external investigators to explore methods to determining primordial non-Gaussianity. As progress develops, hub membership is expected to attract an increasingly diverse set of scientists including string theorists working on inflation, observers interested in the relation between galaxies and their host halos, and many cosmologists with interests in between. By bringing together this diverse set of specialists to meetings and workshops, the hub intends to obtain reliable constraints on, or ideally to detect, primordial non-Gaussianity from DES as well as guide searches in the future.
Past Core projects