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Author

F. Faulstich

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Preprint Aug 2026

A robust and efficient solver for coupled cluster equations

The coupled-cluster (CC) equations are most frequently solved via fixed-point (FP) iterations. However, when formulated in a non-canonical gauge, as in local correlation CC, the FP iteration may converge slowly or even diverge. Practical fixes, such as level-shifting and a direct inversion of iterative subspace (DIIS),...

Chanaka D. M. Mudiyanselage, Kangbo Li, F. Faulstich · 0 citations

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