Bulk model for dissipation and fixing EFT equations on its boundary
Abstract
Effective field theories (EFTs) with higher derivatives often yield equations of motion that define ill-posed problems. We present an action-based approach that supplements a recent well-posed formulation of Figueras with selective dissipation: the EFT field is coupled to an auxiliary field living in one extra dimension, into which the energy of short-wavelength modes can dissipate. The construction is tested numerically on a scalar EFT with a known UV completion. We observe a reduction in spurious oscillations, and, for large couplings, in error. We also compare with the fixing-the-equations approach, and outline the extension to gravity.
Fields of Study & Subjects
Cosmology and Gravitation Theories
Noncommutative and Quantum Gravity Theories
Black Holes and Theoretical Physics
Publication details
- Journal / source
- Physical review. D/Physical review. D.
- Volume
- 114
- Issue
- 7
- Publication date
- 10 September 2026
- Language
- EN