Center for Theoretical Physics of the Universe (CTPU)

Cosmic Birefringence and Electroweak Axion Dark Energy

by Gongjun Choi (CERN)

zoom meeting

zoom meeting


In this talk, we discuss the electroweak (EW) axion quintessence dark energy in light of the recently reported non-zero rotation angle of the cosmic microwave background (CMB) linear polarization β=0.35±0.14deg. We further discuss the model's prediction on the equation of state of EW axion dark energy with the aid of the cosmic birefringence.