de Sitter Swampland, H                         0                          tension & observation

Eoin Ó Colgáin; Maurice H.P.M. van Putten; Hossein Yavartanoo

doi:10.1016/j.physletb.2019.04.032

de Sitter Swampland, H ₀ tension & observation

Eoin Ó Colgáin, Maurice H.P.M. van Putten, Hossein Yavartanoo

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

65 Citations (Scopus)

Abstract

Realising de Sitter vacua in string theory is challenging. For this reason it has been conjectured that de Sitter vacua inhabit the Swampland of inconsistent low-energy effective theories coupled to gravity. Since de Sitter is an attractor for ΛCDM, the conjecture calls ΛCDM into question. Reality appears sympathetic to this idea as local measurements of the Hubble constant H ₀ are also at odds with ΛCDM analysis of Planck data. This tension suggests that the de Sitter state is unstable, thereby implying a turning point in the Hubble parameter. We present a model relieving this tension, which predicts a turning at small positive redshift z _⁎ that is dictated by present-day matter density ω _m . This feature is easily identified by homogeneous surveys covering redshifts z≤0.1. We comment on the implications for the Swampland program.

Original language	English
Pages (from-to)	126-129
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	793
DOIs	https://doi.org/10.1016/j.physletb.2019.04.032
Publication status	Published - 10 Jun 2019
Externally published	Yes

Access to Document

10.1016/j.physletb.2019.04.032

Cite this

@article{a86e363a7082486f921e67738c48267a,

title = " de Sitter Swampland, H 0 tension & observation ",

abstract = " Realising de Sitter vacua in string theory is challenging. For this reason it has been conjectured that de Sitter vacua inhabit the Swampland of inconsistent low-energy effective theories coupled to gravity. Since de Sitter is an attractor for ΛCDM, the conjecture calls ΛCDM into question. Reality appears sympathetic to this idea as local measurements of the Hubble constant H 0 are also at odds with ΛCDM analysis of Planck data. This tension suggests that the de Sitter state is unstable, thereby implying a turning point in the Hubble parameter. We present a model relieving this tension, which predicts a turning at small positive redshift z ⁎ that is dictated by present-day matter density ω m . This feature is easily identified by homogeneous surveys covering redshifts z≤0.1. We comment on the implications for the Swampland program.",

author = "{{\'O} Colg{\'a}in}, Eoin and {van Putten}, {Maurice H.P.M.} and Hossein Yavartanoo",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

month = jun,

day = "10",

doi = "10.1016/j.physletb.2019.04.032",

language = "English",

volume = "793",

pages = "126--129",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

}

de Sitter Swampland, H ₀ tension & observation . / Ó Colgáin, Eoin; van Putten, Maurice H.P.M.; Yavartanoo, Hossein.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 793, 10.06.2019, p. 126-129.

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

TY - JOUR

T1 - de Sitter Swampland, H 0 tension & observation

AU - Ó Colgáin, Eoin

AU - van Putten, Maurice H.P.M.

AU - Yavartanoo, Hossein

PY - 2019/6/10

Y1 - 2019/6/10

N2 - Realising de Sitter vacua in string theory is challenging. For this reason it has been conjectured that de Sitter vacua inhabit the Swampland of inconsistent low-energy effective theories coupled to gravity. Since de Sitter is an attractor for ΛCDM, the conjecture calls ΛCDM into question. Reality appears sympathetic to this idea as local measurements of the Hubble constant H 0 are also at odds with ΛCDM analysis of Planck data. This tension suggests that the de Sitter state is unstable, thereby implying a turning point in the Hubble parameter. We present a model relieving this tension, which predicts a turning at small positive redshift z ⁎ that is dictated by present-day matter density ω m . This feature is easily identified by homogeneous surveys covering redshifts z≤0.1. We comment on the implications for the Swampland program.

AB - Realising de Sitter vacua in string theory is challenging. For this reason it has been conjectured that de Sitter vacua inhabit the Swampland of inconsistent low-energy effective theories coupled to gravity. Since de Sitter is an attractor for ΛCDM, the conjecture calls ΛCDM into question. Reality appears sympathetic to this idea as local measurements of the Hubble constant H 0 are also at odds with ΛCDM analysis of Planck data. This tension suggests that the de Sitter state is unstable, thereby implying a turning point in the Hubble parameter. We present a model relieving this tension, which predicts a turning at small positive redshift z ⁎ that is dictated by present-day matter density ω m . This feature is easily identified by homogeneous surveys covering redshifts z≤0.1. We comment on the implications for the Swampland program.

UR - http://www.scopus.com/inward/record.url?scp=85064545287&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2019.04.032

DO - 10.1016/j.physletb.2019.04.032

M3 - Article

AN - SCOPUS:85064545287

SN - 0370-2693

VL - 793

SP - 126

EP - 129

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

de Sitter Swampland, H ₀ tension & observation

Abstract

Access to Document

Other files and links

Fingerprint

Cite this