Derives closed-form matrix elements for explicitly correlated Gaussian basis in periodic systems and validates on infinite 1D hydrogen chain.
The combined matrix is eA(t,ij) kl = [A(t,ij) kl ] ⊗ I3 with A(t,ij) kl given by Eq
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Explicitly Correlated Gaussian Basis Approach to Periodic Systems
Derives closed-form matrix elements for explicitly correlated Gaussian basis in periodic systems and validates on infinite 1D hydrogen chain.