Jingwei Liu

 

Cosmology

 

 

My area of research is theoretical cosmology, focusing on cosmological anomalies related to CMB observations. I develop and modify inflationary models to study these anomalies and use high-precision CMB data to support or falsify various inflationary models.

Currently, I am investigating the well-known anomaly, the lack of large-angle correlations in the CMB angular correlation function. Our research indicates that this feature is likely caused by a hard cutoff, k_min, at the large-scale end of the primordial power spectrum. This suggests a finite start to inflation and imposes strong constraints on inflationary models. Taken together with other long-standing challenges, this makes it nearly impossible for conventional inflationary models to solve all the difficulties and survive. To support such strong statements, my current work focuses on testing the existence of k_min using existing data and on assessing the potential for using upcoming CMB experiments' results to confirm the existence of k_min.