Stability of Scalar Fields in Warped Extra Dimensions

Understand

This work sets up a general theoretical framework to study stability of models with a warped extra dimension where N scalar fields couple minimally to gravity.

• Our analysis encompasses Randall-Sundrum models with branes and bulk scalars, and general domain-wall models.
• We derive the Schrodinger equation governing the spin-0 spectrum of perturbations of such a system.
• This result is specialized to potentials generated using fake supergravity, and we show that models without branes are free of tachyonic modes.