Research Constrains Dark Energy Models Using Cosmic Birefringence Data

A recent preprint examines pseudo-scalar fields as a form of dynamic dark energy, exploring their potential to induce cosmic birefringence, a rotation in the cosmic microwave background's polarization. By integrating observational data on the universe's expansion and birefringence measurements, the study places limits on the parameters of various dark energy potentials. The findings suggest that axion-like potentials remain viable under specific conditions related to their anomaly coefficients.