Similarity transformation of the electronic Schrödinger equation via Jastrow factorization

Journal article

By expressing the electronic wavefunction in an explicitly correlated (Jastrow-factorized) form, a similarity-transformed effective Hamiltonian can be derived. The effective Hamiltonian is non-Hermitian and contains three-body interactions. The resulting ground-state eigenvalue problem can be solved projectively using a stochastic configuration-interaction formalism. Our approach permits the use of highly flexible Jastrow functions, which we show to be effective in achieving extremely high accuracy, even with small basis sets. Results are presented for the total energies and ionization potentials of the first-row atoms, achieving accuracy within a mH of the basis-set limit, using modest basis sets and computational effort.

Authors: Cohen, AJ; Luo, H; Guther, K; Dobrautz, W; Tew, DP

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: AIP Publishing
• Journal: The Journal of Chemical Physics
• Volume: 151
• Issue: 6
• Article number: 061101
• Publication date: 2019-08-08
• Acceptance date: 2019-07-01
• DOI: 10.1063/1.5116024
• EISSN: 1089-7690
• ISSN: 0021-9606
• Language: English
• Keywords: FFR