title: New implementation of high-level correlated methods using a general block tensor library for high-performance electronic structure calculations.
abstract: This article presents an open-source object-oriented C++ library of classes and routines to perform tensor algebra.The primary purpose of the library is to enable post-Hartree–Fock electronic structure methods; however, the code is general enough to be applicable in other areas of physical and computational sciences. The library supports tensors of arbitrary order (dimensionality), size, and symmetry. Implemented data structures and algorithms operate on large tensors by splitting them into smaller blocks, storing them both in core memory and in files on disk, and applying divide-and-conquer-type parallel algorithms to perform tensor algebra. The library offers a set of general tensor symmetry algorithms and a full implementation of tensor symmetries typically found in electronic structure theory: permutational, spin, and molecular point group symmetry. The Q-Chem electronic structure software uses this library to drive coupled-cluster, equation-of-motion, and algebraic-diagrammatic construction methods.
authors.forename: Evgeny
authors.initials: E
authors.lastname: Epifanovsky
authors.forename: Michael
authors.initials: M
authors.lastname: Wormit
authors.forename: Tomasz
authors.initials: T
authors.lastname: Kuś
authors.forename: Arie
authors.initials: A
authors.lastname: Landau
authors.forename: Dmitry
authors.initials: D
authors.lastname: Zuev
authors.forename: Kirill
authors.initials: K
authors.lastname: Khistyaev
authors.forename: Prashant
authors.initials: P
authors.lastname: Manohar
authors.forename: Ilya
authors.initials: I
authors.lastname: Kaliman
authors.forename: Andreas
authors.initials: A
authors.lastname: Dreuw
authors.forename: Anna I
authors.initials: AI
authors.lastname: Krylov