Tor S. Haugland

TL;DR: In this paper, the Flatiron Institute has acknowledged computing resources through UNINETT Sigma2 (National Infrastructure for High Performance Computing and Data Storage in Norway) through Project No. NN2962k.

TL;DR: The eT program as discussed by the authors is an open source electronic structure package with emphasis on coupled cluster and multilevel methods, including efficient spin adapted implementations of ground and excited singlet states, as well as equation of motion oscillator strengths.

TL;DR: In this paper, the authors investigate how strong light-matter coupling inside an optical cavity can modify intermolecular forces and illustrate the varying necessity of correlation in their description, and propose optical cavities as a novel tool to manipulate and control ground state properties.

TL;DR: It is demonstrated that electron-photon correlation is fundamental to describe intermolecular interactions in strong light-matter coupling and proposed optical cavities as a novel tool to manipulate and control ground state properties, solvent effects, and intermolescular interactions for molecules and materials.

TL;DR: The eT program, an open source electronic structure package with emphasis on coupled cluster and multilevel methods, has similar advantages as codes using density fitting, but with strict error control and is expected to become a valuable resource to the electronic structure community.