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Pushing configuration-interaction to the limit: Towards massively parallel MCSCF calculations

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4989858· OSTI ID:1436649
 [1];  [2];  [3];  [4];  [5]
  1. Univ. of Minnesota, Minneapolis, MN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States); Max Planck Institut fur Festkorperforschung, Stuttgart (Germany)
  3. Aarhus Univ., Aarhus C (Denmark)
  4. Univ. of Minnesota, Minneapolis, MN (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
A new large-scale parallel multiconfigurational self-consistent field (MCSCF) implementation in the open-source NWChem computational chemistry code is presented. The generalized active space approach is used to partition large configuration interaction (CI) vectors and generate a sufficient number of batches that can be distributed to the available cores. Massively parallel CI calculations with large active spaces can be performed. The new parallel MCSCF implementation is tested for the chromium trimer and for an active space of 20 electrons in 20 orbitals, which can now routinely be performed. Unprecedented CI calculations with an active space of 22 electrons in 22 orbitals for the pentacene systems were performed and a single CI iteration calculation with an active space of 24 electrons in 24 orbitals for the chromium tetramer was possible. In conclusion, the chromium tetramer corresponds to a CI expansion of one trillion Slater determinants (914 058 513 424) and is the largest conventional CI calculation attempted up to date.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
SC-22.1 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE
Grant/Contract Number:
AC02-05CH11231; SC0008666
OSTI ID:
1436649
Alternate ID(s):
OSTI ID: 1420593
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 18 Vol. 147; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (20)

Computational Approach to Molecular Catalysis by 3d Transition Metals: Challenges and Opportunities journal October 2018
The Shape of Full Configuration Interaction to Come journal December 2020
CASSCF with Extremely Large Active Spaces using the Adaptive Sampling Configuration Interaction Method text January 2019
Enhancing robustness and efficiency of density matrix embedding theory via semidefinite programming and local correlation potential fitting text January 2020
Machine learning for electronically excited states of molecules text January 2020
Ground and Excited State First-Order Properties in Many-Body Expanded Full Configuration Interaction Theory text January 2020
How will quantum computers provide an industrially relevant computational advantage in quantum chemistry? preprint January 2020
Multireference Approaches to Spin‐State Energetics of Transition Metal Complexes Utilizing the Density Matrix Renormalization Group journal February 2019
autoCAS : A Program for Fully Automated Multiconfigurational Calculations journal June 2019
Density matrix renormalization group pair-density functional theory (DMRG-PDFT): singlet–triplet gaps in polyacenes and polyacetylenes journal January 2019
Perspective: Multireference coupled cluster theories of dynamical electron correlation journal July 2018
Modeling core-level excitations with variationally optimized reduced-density matrices and the extended random phase approximation journal December 2018
Second-order MCSCF optimization revisited. I. Improved algorithms for fast and robust second-order CASSCF convergence journal May 2019
Ground-state actinide chemistry with scalar-relativistic multiconfiguration pair-density functional theory journal October 2019
Evaluation of full valence correlation energies and gradients journal June 2019
Projected density matrix embedding theory with applications to the two-dimensional Hubbard model journal August 2019
A systematic construction of configuration interaction wavefunctions in the complete CI space journal October 2019
MCSCF optimization revisited. II. Combined first- and second-order orbital optimization for large molecules journal February 2020
The all configuration mean energy multiconfiguration self-consistent-field method. I. Equal configuration weights journal August 2018
Density matrix renormalization group pair-density functional theory (DMRG-PDFT): singlet-triplet gaps in polyacenes and polyacetylenes text January 2019

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