Hirschfelder-Silbey perturbation

Chalasinski G, Jeziorski B, Szalewicz K (1977) On the convergence properties of the Rayleigh-Schrodinger and the Hirschfelder-Silbey perturbation expansions for molecular interaction energies. Int J Quantum Chem 11 247-257... 

Table 3 Convergence of the symmetrized Rayleigh-Schrodinger and Hirschfelder-Silbey perturbation expansions for the interaction of two ground-state helium atoms at various interatomic distances. The B71 basis set was used. E(n) and S(n) are defined as in Table 1. Energies are in //hartree.

Perturbation equations of the Hirschfelder-Silbey theory can be derived by using the concept of the primitive (localized) wave function F formally defined as,... 

Polymeropoulos EE, Adams WH (1978) Exchange perturbation theory, III. Hirschfelder-Silbey type. Phys Rev A 17 24-29... 

ATM = Axilrod-Teller-Muto term CCD = coupled-clu.s-ter doubles CCSD = coupled-cluster singles and doubles CP = counterpoise (technique) DCBS = dimer-centered basis set HS = Hirschfelder-Silbey theory SAPT = symmetry-adapted perturbation theory SRS = symmetrized Rayleigh-Schrd-dinger series. 

Table 1 Convergence of the Polarization (RS), Symmetrized Rayle-igh-Schrodinger (SRS), and Hirschfelder-Silbey (HS) Perturbation pansions for the Interaction Energy of two Ground-state Helium Atoms at the Equilibrium Interatomic Distance of 5.6 bohr using a Basis Set of 71 Orbitals ...

Hirschfelder JO, Silbey R (1966) New type of molecular perturbation treatment. J Chem Phys 45 2188-2192... 

All the SAPT methods considered so far have used a single operator projecting onto a specific subspace c a b- The HS perturbation theory, introduced by Hirschfelder and Silbey [50], follows a different, multistate philosophy. It performs a perturbation expansion for a primitive func-... 

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