Testing the Swampland: H0 tension

Eoin Ó Colgáin; Hossein Yavartanoo

doi:10.1016/j.physletb.2019.134907

Testing the Swampland: H₀ tension

Eoin Ó Colgáin
, Hossein Yavartanoo

Asia Pacific Center for Theoretical Physics
Pohang University of Science and Technology
CAS - Institute of Theoretical Physics

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

The de Sitter Swampland conjecture compels us to consider dark energy models where λ(ϕ)≡|∇_ϕV|/V is bounded below by a positive constant. Moreover, it has been argued for Quintessence models that the constant λ scenario is the least constrained. Here we demonstrate that increasing λ only exacerbates existing tension in the Hubble constant H₀. The identification of dark energy models that both evade observational bounds and alleviate H₀ tension constitutes a robust test for the Swampland program.

Original language	English
Article number	134907
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	797
DOIs	https://doi.org/10.1016/j.physletb.2019.134907
Publication status	Published - 10 Oct 2019
Externally published	Yes

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title = "Testing the Swampland: H0 tension",

abstract = "The de Sitter Swampland conjecture compels us to consider dark energy models where λ(ϕ)≡|∇ϕV|/V is bounded below by a positive constant. Moreover, it has been argued for Quintessence models that the constant λ scenario is the least constrained. Here we demonstrate that increasing λ only exacerbates existing tension in the Hubble constant H0. The identification of dark energy models that both evade observational bounds and alleviate H0 tension constitutes a robust test for the Swampland program.",

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AB - The de Sitter Swampland conjecture compels us to consider dark energy models where λ(ϕ)≡|∇ϕV|/V is bounded below by a positive constant. Moreover, it has been argued for Quintessence models that the constant λ scenario is the least constrained. Here we demonstrate that increasing λ only exacerbates existing tension in the Hubble constant H0. The identification of dark energy models that both evade observational bounds and alleviate H0 tension constitutes a robust test for the Swampland program.

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Testing the Swampland: H₀ tension

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