The Cosmological Constant as Event Horizon

Enrique Gaztanaga

doi:10.3390/symmetry14020300

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arXiv · 2202.00641

The Cosmological Constant as Event Horizon

Enrique Gaztanaga

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Abstract

General Relativity allows for a cosmological constant ($\Lambda$) which has inspired models of cosmic Inflation and Dark Energy. We show instead that $r_\Lambda = \sqrt{3/\Lambda}$ corresponds to an event horizon: a causal boundary term in the action. Our Universe is expanding inside its Schwarzschild radius $r_S=\rL=2GM$, 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.

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Enrique Gaztanaga. 2022-02-01. The Cosmological Constant as Event Horizon. https://doi.org/10.3390/symmetry14020300

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