Speaker
Description
"Measuring primordial non-Gaussianities will open a new window to study quantum fluctuations and interactions during inflation. A detection of non-zero PNGs in either the cosmic microwave backgroun (CMB) or large-scale structure (LSS) however proves to be elusive. Current and upcoming LSS 3D maps will provide data with competitive and better statistical power than the CMB 2D map---provided that systematics can be kept under control.
In this talk, I will first present several new paths towards the first detection and measurement of PNGs using LSS data. These paths include either novel observables (https://arxiv.org/abs/2603.20196), new modeling methods (https://arxiv.org/abs/2607.01314) or novel statistics of LSS (in prep).
As the ongoing DESI, Euclid, LSST, SPHEREx, and the upcoming Roman, 4MOST, CSST will be all targeting PNGs as one of their primary (if not the main) science cases, it is now timely to discuss which strategies would be robust to apply to these data sets with (in many cases, very) different systematics. If time allows, I will discuss this question in the later part of my talk."