Probing Inflation and more with cosmic large-scale structure

In the current era of precision cosmology, cosmological observations have become a unique probe of many fundamental physics questions that are hard or even impossible to address with conventional terrestrial experiments. In this seminar, I will discuss examples of what this "cosmic laboratory" teaches us, with a focus on galaxy clustering and inflation. After a detailed introduction of some of the phenomenology of inflation, I will discuss how near-future galaxy surveys may be able to distinguish between single- and multifield scenarios by taking advantage of the imprint of primordial non-Gaussianity on galaxy bias. I will then discuss both general requirements on galaxy surveys for them to take optimal advantage of this signal, and opportunities with specific future surveys. In particular, I will briefly introduce the recently proposed SPHEREx space telescope.

Speaker: 
Roland de Putter
Speaker Introduction: 

Roland de Putter is a senior postdoctoral researcher in physics at the California Institute of Technology. His research interests span a range of topics in theoretical and observational cosmology, including inflation, dark energy, dark matter, neutrino physics, the cosmic microwave background, weak gravitational lensing and galaxy clustering.

Place: 
KIAA-PKU Auditorium
Host: 
Gregory Herczeg
Time: 
Monday, February 20, 2017 - 4:00pm to 5:00pm