eT 1.0: an open source electronic structure program with emphasis on coupled cluster and multilevel methods
Abstract
The eT program is an open source electronic structure package with emphasis on coupled cluster and multilevel methods. It includes efficient spin adapted implementations of ground and excited singlet states, as well as equation of motion oscillator strengths, for CCS, CC2, CCSD, and CC3. Furthermore, eT provides unique capabilities such as multilevel Hartree-Fock and multilevel CC2, real-time propagation for CCS and CCSD, and efficient CC3 oscillator strengths. With a coupled cluster code based on an efficient Cholesky decomposition algorithm for the electronic repulsion integrals, eT has similar advantages as codes using density fitting, but with strict error control. Here we present the main features of the program and demonstrate its performance through example calculations. Because of its availability, performance, and unique capabilities, we expect eT to become a valuable resource to the electronic structure community.
Keywords
Cite
@article{arxiv.2002.05631,
title = {eT 1.0: an open source electronic structure program with emphasis on coupled cluster and multilevel methods},
author = {Sarai D. Folkestad and Eirik F. Kjønstad and Rolf H. Myhre and Josefine H. Andersen and Alice Balbi and Sonia Coriani and Tommaso Giovannini and Linda Goletto and Tor S. Haugland and Anders Hutcheson and Ida-Marie Høyvik and Torsha Moitra and Alexander C. Paul and Marco Scavino and Andreas S. Skeidsvoll and Åsmund H. Tveten and Henrik Koch},
journal= {arXiv preprint arXiv:2002.05631},
year = {2020}
}
Comments
31 pages and 10 figures - supplementary information included in the uploaded files