1. An analytic approach to quasinormal modes for coupled linear systems Hui, Lam; Podo, Alessandro; Santoni, Luca; Trincherini, Enrico 2023 Articles GravityGeneral relativity (Physics)Black holes (Astronomy)Perturbation (Mathematics)

2. Anharmonic Phonon Behavior using Hamiltonian constructed via Irreducible Derivatives Xiao, Enda 2023 Theses Condensed matterPhononsHamiltonian systemsX-rays--ScatteringHartree-Fock approximationQuasiparticles (Physics)Perturbation (Mathematics)Green's functions

3. The Effective Field Theory Approach to Fluid Dynamics Endlich, Solomon 2013 Theses PhysicsCondensed matterField theory (Physics)Fluid dynamicsPerturbation (Mathematics)Quantum theoryHydrodynamics