4 papers
Attenuation of long-wavelength sound in quenched disordered media
Bingyu Cui, Yuqi Wang
We derive analytically, and validate numerically, the dispersion renormalization and attenuation of acoustic waves propagating through quenched disordered media in the long-wavelen…
Multi-reference GW approximation for strongly correlated molecules
Yuqi Wang, Wei-Hai Fang, Zhendong Li
The GW approximation is a cornerstone of many-body perturbation theory for computing single-particle excitations, yet it fundamentally breaks down in strongly correlated systems wh…
A unified diagrammatic formulation of single-reference and multi-reference random phase approximations: the particle-hole and particle-particle channels
Yuqi Wang, Wei-Hai Fang, Zhendong Li
A diagrammatic multi-reference generalization of many-body perturbation theory was recently introduced [J. Phys. Chem. Lett., 2025, 16, 3047]. This framework allows us to extend si…
Generalized many-body perturbation theory for the electron correlation energy: multi-reference random phase approximation via diagrammatic resummation
Yuqi Wang, Wei-Hai Fang, Zhendong Li
Many-body perturbation theory (MBPT) based on Green's functions and Feynman diagrams provides a fundamental theoretical framework for various \emph{ab initio} computational approac…