The Cosmic Microwave Background (CMB) is one of the strongest pieces of evidence for the Big Bang theory and now serves as a valuable tool to study cosmic inflation. We anticipate that the CMB’s B-mode polarization will provide critical evidence for inflation and enable the detection of yet-to-be-observed primordial gravitational waves. In this work, we focus on reconstructing the primordial B-mode signal from simulated observational data, from the upcoming Indian space mission, Exploring Cosmic History and Origin (ECHO) (a.k.a. CMB Bharat). We employ state-of-the-art data analysis techniques, such as score-based diffusion models using stochastic differential equations (SDE), with a denoising objective to reconstruct the required signal amidst highly contaminated detector noise. These models have the potential to detect primordial B-modes, as well as broader applications in astronomy and cosmology.
Anumanchi Agastya Sai Ram Likhit
Supervisor: Dr. Rajib Saha