Limits from Weak Gravity Conjecture on Dark Energy Models

Abstract

The weak gravity conjecture has been proposed as a criterion to distinguish the landscape from the swampland in string theory. As an application in cosmology of this conjecture, we use it to impose theoretical constraint on parameters of two types of dark energy models. Our analysis indicates that the Chaplygin-gas-type models realized in quintessence field are in the swampland, whereas the $a$ power-low decay model of the variable cosmological constant can be viable but the parameters are tightly constrained by the conjecture.

Revtex4, 8 pages, 5 figures; References, minor corrections in content, and acknowledgement added

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Cited by in corpus (7)

• Fixed points in interacting dark energy models
• Constraining the interacting dark energy models from weak gravity conjecture and recent observations
• Theoretical Limits on Agegraphic Quintessence from Weak Gravity Conjecture
• Constraints on Dark Energy Models from Weak Gravity Conjecture
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Weak Gravity Conjecture and Holographic Dark Energy Model with Interaction and Spatial Curvature
• Weak Gravity Conjecture and Holographic/Agegraphic Dark Energy