Abstract
The construction of a symplectic basis set with >N electrons is exhibited by means of three kinds of units, the first kind geminal, the second kind geminal and the one‐particle operators. The optimization procedure of the variation method is extended to the coefficients in the linear sum of the symplectic bases, the parameters in the geminals, and the orbitals. For practical use, these bases are expanded explicitly as a linear sum of the Slater determinants. For illustration, the LiH molecule, which is taken as an example, is calculated by using some symplectic bases.
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Liu, J., Sun, C., Huang, X. et al. On geminals and symplectic bases in quantum chemistry. Journal of Mathematical Chemistry 21, 159–182 (1997). https://doi.org/10.1023/A:1019118318475
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DOI: https://doi.org/10.1023/A:1019118318475