Fundamental Forces and Scalar Field Dynamics in the Early Universe

Understand

Scalar weak gravity conjectures (SWGCs) attempt to pinpoint the ranges of couplings consistent with a fundamental theory of all interactions.

• We identify a generic dynamical consequence of these conjectures for cosmology and show that SWGCs imply a particular behavior of the scalar fields in the early universe.
• A scalar field that develops a large expectation value during inflation must relax to the minimum of effective potential at a later time.
• SWGCs imply that a homogeneous distribution of the field is unstable with respect to fragmentation into localized lumps, which could potentially lead to significant consequences for cosmology.