The cosmological constant as event horizon

Enrique Gaztanaga*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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General Relativity allows for a cosmological constant (Ʌ) which has inspired models of cosmic Inflation and Dark Energy. We show instead that rɅ = √3/ Ʌ corresponds to an event horizon: A causal boundary term in the action. Our Universe is expanding inside its Schwarzschild radius rS = rL = 2GM, which could have originated from a uniform free falling cloud of mass M that collapsed as a Black Hole (BH) 25 Gyrs ago. Such a BH Universe allows for large-scale structure formation without the need of Inflation or Dark Energy.

Original languageEnglish
Article number300
Number of pages8
Issue number2
Publication statusPublished - 1 Feb 2022


  • Black holes
  • Cosmology
  • Dark energy
  • General relativity

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