Joshua Sobrin

Associate Fellow, KICP
Lederman Postdoctoral Research Fellow, Fermilab

Joshua Sobrin


Ph.D., Physics, University of Chicago, 2022


My research centers on successfully designing and building instruments to measure the CMB and LSS with optimized sensitivity and reach, and using those measurements to detect new observables that constrain fundamental physics in better ways. My previous work focused on the design, construction, testing, and commissioning of SPT-3G --- currently one of the most sensitive high-resolution CMB experiments in operation. I am currently leading an analysis of the first two years of SPT-3G data to catalog and characterize galaxy clusters by measuring the Sunyaev-Zeldovich (SZ) effect, with a particular focus on detecting previously undiscovered, high-redshift clusters. I am also especially interested in developing CMB-S4, a next-generation CMB experiment that is aimed to improve constraints on inflationary gravity waves and light relic particles by over an order of magnitude over current constraints.

Selected Publications