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Title: A Ranked-Orbital Approach to Select Active Spaces for High-Throughput Multireference Computation

Abstract

The past decade has seen a great increase in the application of high-throughput computation to a variety of important problems in chemistry. However, one area which has been resistant to the high-throughput approach is multireference wave function methods, in large part due to the technicalities of setting up these calculations and in particular the not always intuitive challenge of active space selection. As we look toward a future of applying high-throughput computation to all areas of chemistry, it is important to prepare these methods for large-scale automation. Here, we propose a ranked-orbital approach to select active spaces with the goal of standardizing multireference methods for high-throughput computation. This method allows for the meaningful comparison of different active space selection schemes and orbital localizations, and we demonstrate the utility of this approach across 1120 multireference calculations for the excitation energies of small molecules. Our results reveal that it is helpful to distinguish the method used to generate orbitals from the method of ranking orbitals in terms of importance for the active space. Additionally, we propose our own orbital ranking scheme that estimates the importance of an orbital for the active space through a pair-interaction framework from orbital energies and features ofmore » the Hartree–Fock exchange matrix. Here, we call this new scheme the “approximate pair coefficient” (APC) method and we show that it performs quite well for the test systems presented.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1778899
Grant/Contract Number:  
SC0012702
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Theory and Computation
Additional Journal Information:
Journal Volume: 17; Journal Issue: 5; Journal ID: ISSN 1549-9618
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Entropy; Central nervous system; Approximation; Energy; Chemical calculations

Citation Formats

King, Daniel S., and Gagliardi, Laura. A Ranked-Orbital Approach to Select Active Spaces for High-Throughput Multireference Computation. United States: N. p., 2021. Web. doi:10.1021/acs.jctc.1c00037.
King, Daniel S., & Gagliardi, Laura. A Ranked-Orbital Approach to Select Active Spaces for High-Throughput Multireference Computation. United States. https://doi.org/10.1021/acs.jctc.1c00037
King, Daniel S., and Gagliardi, Laura. Fri . "A Ranked-Orbital Approach to Select Active Spaces for High-Throughput Multireference Computation". United States. https://doi.org/10.1021/acs.jctc.1c00037. https://www.osti.gov/servlets/purl/1778899.
@article{osti_1778899,
title = {A Ranked-Orbital Approach to Select Active Spaces for High-Throughput Multireference Computation},
author = {King, Daniel S. and Gagliardi, Laura},
abstractNote = {The past decade has seen a great increase in the application of high-throughput computation to a variety of important problems in chemistry. However, one area which has been resistant to the high-throughput approach is multireference wave function methods, in large part due to the technicalities of setting up these calculations and in particular the not always intuitive challenge of active space selection. As we look toward a future of applying high-throughput computation to all areas of chemistry, it is important to prepare these methods for large-scale automation. Here, we propose a ranked-orbital approach to select active spaces with the goal of standardizing multireference methods for high-throughput computation. This method allows for the meaningful comparison of different active space selection schemes and orbital localizations, and we demonstrate the utility of this approach across 1120 multireference calculations for the excitation energies of small molecules. Our results reveal that it is helpful to distinguish the method used to generate orbitals from the method of ranking orbitals in terms of importance for the active space. Additionally, we propose our own orbital ranking scheme that estimates the importance of an orbital for the active space through a pair-interaction framework from orbital energies and features of the Hartree–Fock exchange matrix. Here, we call this new scheme the “approximate pair coefficient” (APC) method and we show that it performs quite well for the test systems presented.},
doi = {10.1021/acs.jctc.1c00037},
journal = {Journal of Chemical Theory and Computation},
number = 5,
volume = 17,
place = {United States},
year = {Fri Apr 16 00:00:00 EDT 2021},
month = {Fri Apr 16 00:00:00 EDT 2021}
}

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