Recent developments in the general atomic and molecular electronic structure system

• Published in: The Journal of chemical physics Vol. 152; no. 15; pp. 154102 - 154127
• Main Authors: Barca, Giuseppe M. J., Bertoni, Colleen, Carrington, Laura, Datta, Dipayan, De Silva, Nuwan, Deustua, J. Emiliano, Fedorov, Dmitri G., Gour, Jeffrey R., Gunina, Anastasia O., Guidez, Emilie, Harville, Taylor, Irle, Stephan, Ivanic, Joe, Kowalski, Karol, Leang, Sarom S., Li, Hui, Li, Wei, Lutz, Jesse J., Magoulas, Ilias, Mato, Joani, Mironov, Vladimir, Nakata, Hiroya, Pham, Buu Q., Piecuch, Piotr, Poole, David, Pruitt, Spencer R., Rendell, Alistair P., Roskop, Luke B., Ruedenberg, Klaus, Sattasathuchana, Tosaporn, Schmidt, Michael W., Shen, Jun, Slipchenko, Lyudmila, Sosonkina, Masha, Sundriyal, Vaibhav, Tiwari, Ananta, Galvez Vallejo, Jorge L., Westheimer, Bryce, Włoch, Marta, Xu, Peng, Zahariev, Federico, Gordon, Mark S.
• Format: Journal Article
• Language: English
• Published: United States American Institute of Physics 21.04.2020; American Institute of Physics (AIP)
• Subjects: Accelerators; ATOMIC AND MOLECULAR PHYSICS; computational chemistry software; Electronic structure; GAMESS; General Atomic and Molecular Electronic Structure System; Graphics processing units; Molecular orbitals; Molecular structure; Perturbation theory; Power consumption; quantum chemistry
• ISSN: 0021-9606; 1089-7690; 1089-7690
• DOI: 10.1063/5.0005188

A discussion of many of the recently implemented features of GAMESS (General Atomic and Molecular Electronic Structure System) and LibCChem (the C++ CPU/GPU library associated with GAMESS) is presented. These features include fragmentation methods such as the fragment molecular orbital, effective fragment potential and effective fragment molecular orbital methods, hybrid MPI/OpenMP approaches to Hartree–Fock, and resolution of the identity second order perturbation theory. Many new coupled cluster theory methods have been implemented in GAMESS, as have multiple levels of density functional/tight binding theory. The role of accelerators, especially graphical processing units, is discussed in the context of the new features of LibCChem, as it is the associated problem of power consumption as the power of computers increases dramatically. The process by which a complex program suite such as GAMESS is maintained and developed is considered. Future developments are briefly summarized.