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Improve NTTDA projection and add explicit TDA matrices - #14

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wtpeter merged 3 commits into
NonDFT:mainfrom
wtpeter:refactor/nttda-projection
Sep 23, 2026
Merged

wtpeter merged 3 commits into
NonDFT:mainfrom
wtpeter:refactor/nttda-projection

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@wtpeter wtpeter commented Sep 22, 2026

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Project out the redundant spin-lowering direction during NTTDA Davidson iterations, replacing the extra-root calculation and energy-based filtering. Improve sanity checks and logging.

Add an independent, formula-based get_ab for all three spin sectors, including CPU density fitting, with a standalone test file and example.

Validation: H2O2/6-31G tests compare 10 random vectors against vind for conventional and DF calculations; the example agrees with Davidson energies. Ruff passes.

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wtpeter requested a lite review from Copilot September 22, 2026 14:04

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Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.

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wtpeter requested a lite review from Copilot September 22, 2026 14:21

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Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.

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wtpeter requested a lite review from Copilot September 23, 2026 04:33

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Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.

@wtpeter
wtpeter merged commit 0e7d707 into NonDFT:main Sep 23, 2026
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@wtpeter
wtpeter deleted the refactor/nttda-projection branch September 25, 2026 08:30
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2 participants