Statistical comparison of axion-like EDE models shows n=3 yields lowest χ² and consistent photon couplings to Planck-EB and ACT-EB data, outperforming n=2 and n=∞.
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Constraining the Potential Index $n$ of the Early Dark Energy Model Using Cosmic Birefringence from Planck and ACT
Statistical comparison of axion-like EDE models shows n=3 yields lowest χ² and consistent photon couplings to Planck-EB and ACT-EB data, outperforming n=2 and n=∞.