Publications [#330923] of Weitao Yang

Journal Articles

1. Zhang, D; Su, NQ; Yang, W, Accurate Quasiparticle Spectra from the T-Matrix Self-Energy and the Particle-Particle Random Phase Approximation., The journal of physical chemistry letters, vol. 8 no. 14 (July, 2017), pp. 3223-3227 [doi]
   (last updated on 2026/01/16)

   Abstract:
   The GW self-energy, especially G₀W₀ based on the particle-hole random phase approximation (phRPA), is widely used to study quasiparticle (QP) energies. Motivated by the desirable features of the particle-particle (pp) RPA compared to the conventional phRPA, we explore the pp counterpart of GW, that is, the T-matrix self-energy, formulated with the eigenvectors and eigenvalues of the ppRPA matrix. We demonstrate the accuracy of the T-matrix method for molecular QP energies, highlighting the importance of the pp channel for calculating QP spectra.