4 papers
Vision Transformers for Cosmological Fields: Application to Weak Lensing Mass Maps
Jash Kakadia, Shubh Agrawal, Kunhao Zhong +1
Weak gravitational lensing is a powerful probe of the universe's growth history. While traditional two-point statistics capture only the Gaussian features of the convergence field,…
Separating the Inseparable: Constraining Arbitrary Primordial Bispectra with Cosmic Microwave Background Data
Oliver H. E. Philcox, Kunhao Zhong, Salvatore Samuele Sirletti
To efficiently probe primordial non-Gaussianity using Cosmic Microwave Background (CMB) data, we require theoretical predictions that are factorizable, \textit{i.e.}\ those whose k…
Tests of Evolving Dark Energy with Geometric Probes of the Late-Time Universe
Kunhao Zhong, Bhuvnesh Jain
Recent results from the Dark Energy Spectroscopic Instrument (DESI) have shown a strong statistical preference for a time-evolving dark energy model over CDM when combining BAO…
Fast Generation of Weak Lensing Maps with Analytical Point Transformation Functions
Kunhao Zhong, Gary Bernstein, Supranta S. Boruah +2
Nonlinear cosmological fields like galaxy density and lensing convergence can be approximately related to Gaussian fields via analytic point transforms. The lognormal transform (LN…