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This research focuses on developing local natural orbital (LNO)-based coupled cluster methods to enhance accuracy in chemical calculations.

April 10, 2026The Journal of Physical Chemistry AOpen Access

Development of Local Natural Orbital Arbitrary Order Coupled Cluster Methods and Assessment through Connected Quadruples

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Authors

VFVladimir FishmanWeizmann Institute of Science BLBalázs D. LőrinczBudapest University of Technology and Economics ESEmmanouil SemidalasNational and Kapodistrian University of Athens

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Implication

Development of local natural orbital-based methods improves accuracy in thermochemistry for larger molecular systems, indicating advanced computational capabilities.

Key Points

This research focuses on developing local natural orbital (LNO)-based coupled cluster methods to enhance accuracy in chemical calculations.
Developed LNO-based arbitrary order coupled cluster methods including closed- and open-shell implementations.
Assessed accuracy through benchmarks for thermochemistry and noncovalent interactions via CCSDTQ.
Utilized multilevel embedding and point group symmetry to optimize computations.
Evaluated performance by adjusting LNO thresholds for accuracy.
Achieved 85-95% relative accuracy and 0.05-0.1 kcal/mol absolute accuracy for complex atomization and barrier heights.
Demonstrated improved performance with tighter LNO settings for small effect calculations.
Enabled successful reaction energy correction computations for real-life enzyme reactions, expanding the applicability of post-CCSD(T) methods.

Cite This Study

Fishman et al. (2026) studied this question.

synapsesocial.com/papers/69d8967d6c1944d70ce07e19 https://doi.org/10.1021/acs.jpca.6c00607

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Implication

Development of local natural orbital-based methods improves accuracy in thermochemistry for larger molecular systems, indicating advanced computational capabilities.

Development of Local Natural Orbital Arbitrary Order Coupled Cluster Methods and Assessment through Connected Quadruples

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Implication

Key Points

Cite This Study

Development of Local Natural Orbital Arbitrary Order Coupled Cluster Methods and Assessment through Connected Quadruples

Discussion

Member takes

Implication

Key Points

Cite This Study

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