3 papers
physics.chem-ph2026
Random phase approximation-based local natural orbital coupled cluster theory
Ruiheng Song, Xiliang Gong, Aamy Bakry +1
Practical applications of fragment embedding and closely related local correlation methods critically depend on a judicious choice of a low-level theory to define the local embeddi…
physics.chem-ph2025
Unphysical Solutions in Coupled-Cluster-Based Random Phase Approximation and How to Avoid Them
Ruiheng Song, Xiliang Gong, Hong-Zhou Ye
The direct ring coupled-cluster doubles (drCCD)-based random phase approximation (RPA) has provided an attractive framework for the development and application of RPA-related metho…
cond-mat.str-el2024
Combining complex conjugation, time-reversal, and spin symmetry projection of coupled cluster wave functions
Ruiheng Song, Thomas M. Henderson, Gustavo E. Scuseria
Complex conjugation symmetry breaking and restoration generate two non-orthogonal configurations at the Hartree-Fock level that can capture static correlation naturally. In conjunc…