Early Dark Energy can Resolve the Hubble Tension.

  title={Early Dark Energy can Resolve the Hubble Tension.},
  author={V. Poulin and T. Smith and Tanvi Karwal and M. Kamionkowski},
  journal={Physical review letters},
  volume={122 22},
  • V. Poulin, T. Smith, +1 author M. Kamionkowski
  • Published 2019
  • Physics, Medicine
  • Physical review letters
  • Early dark energy (EDE) that behaves like a cosmological constant at early times (redshifts z≳3000) and then dilutes away like radiation or faster at later times can solve the Hubble tension. In these models, the sound horizon at decoupling is reduced resulting in a larger value of the Hubble parameter H_{0} inferred from the cosmic microwave background (CMB). We consider two physical models for this EDE, one involving an oscillating scalar field and another a slowly rolling field. We perform a… CONTINUE READING
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