Isocurvature perturbations of dark energy and dark matter from the Swampland conjecture

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We point out that the recently proposed Swampland conjecture on the potential gradient can lead to isocurvature perturbations of dark energy, if the quintessence field acquires large quantum fluctuations during high-scale inflation preferred by the conjecture. Also, if the quintessence field is coupled to a dark sector that contains dark matter, isocurvature perturbation of dark matter is similarly induced. Both isocurvature perturbations can be suppressed if the quintessence potential allows a tracker solution in the early Universe. We find that a vector field of mass ≲ O(1) meV is an excellent dark matter candidate in this context, not only because the right abundance is known to be produced by quantum fluctuations during high-scale inflation without running afoul of isocurvature bounds, but also because its coupling to the quintessence does not spoil the flatness of the potential.

本文言語English
ページ(範囲)387-392
ページ数6
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
789
DOI
出版ステータスPublished - 2019 2 10

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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