6 papers
From Scalar to : A Reformulation of the Hubble Tension
Seokcheon Lee
The Hubble tension is usually expressed as a discrepancy between the low H_0 inferred from Planck CMB data within base \LambdaCDM and the higher value obtained from late-time dista…
Structural Limitations on Constraining the Time Evolution of Dark Energy
Seokcheon Lee
Cosmological constraints on a time-varying dark energy equation of state are fundamentally limited by the integral structure through which the equation of state enters cosmological…
Complementary Roles of Distance and Growth Probes in Testing Time-Varying Dark Energy
Seokcheon Lee
Distance measurements have long provided the primary observational constraints on the expansion history of the Universe and the properties of dark energy. However, because such obs…
Controlled Tension Forecasting: Quantifying Cross-Probe Biases in CDM
Seokcheon Lee
Recent analyses combining DESI DR2 BAO, Planck CMB, and Pantheon+ SNe have reported mild deviations from the \LambdaCDM model. A central challenge is to determine whether these dev…
Pedagogic Null Tests of Dynamical Dark Energy Hints: Reconstructing LambdaCDM with Consistent BAO, CMB, and SNe Mocks
Seokcheon Lee
Hints of a dynamical dark-energy equation of state have appeared in several combined cosmological probes. However, such indications may instead arise from the intrinsic likelihood…
Geometric Interpretation of the Redshift Evolution of H_0(z)
Seokcheon Lee
Recent analyses of the Master Type Ia supernova (SN Ia) sample have revealed a mild redshift dependence in the inferred local Hubble parameter, often expressed as tilde{H}_0(z) = H…