I spend most of my research effort investigating the initial conditions of the Universe by imaging and analyzing the polarized cosmic microwave background (CMB). We built the BICEP3 experiment and use its data along with data from BICEP Array, Planck, WMAP and SPT-3G to validate or constrain models of the inflation paradigm of the standard cosmology. We're also conducting R&D and designing the superconducting detector readout system of the next-generation CMB-S4 experiment.
Recently, I've become interested in using the weak lensing of the CMB in conjunction with galaxy surveys to understand the large-scale structure of the universe. Our group is involved with the Simons Observatory in Chile to pursue this science. We devised and built a sophisticated detector readout system for this experiment and in 2024 are working with our collaborators to bring the observatory online.
Some more long-term interests include next-generation large-scale structure surveys (beyond VRO, DESI etc.) to map the matter power spectrum out to high redshift to study if cosmic inflation was driven by a single field as assumed in simple models, or whether there were other fields and dynamics at play at the earliest moments of the Universe.