The computation of the relativistic correction to the first order in 1rc 2 , where c is the velocity of light, is implemented at the levels of coupled cluster and many-body perturbation theory. The relativistic correction is obtained by applying direct perturbation theory through the first order, an
Validity of first-order perturbation theory for relativistic energy corrections
β Scribed by Ernest R. Davidson; Yasuyuki Ishikawa; Gulzari L. Malli
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 119 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
f ust-order rclatlvlstlc calculations give ;1 rclatlve error m the estimate of the total correctlon whtch mcreases tie 2' Recent &St-order relatxbtstic calcufatrons wzth the
π SIMILAR VOLUMES
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The exact analytic first-order wavefunction of an H atom in the field of a proton obtained from the unsymmetrized perturbation theory as calculated in 1957 by Dalgamo and Lynn is used to calculate the exchange energy of Hz with the Holstein-Herring method. The asymptotic exchange energy obtained fro
Recently, two different but conceptually similar basis set Ε½ . superposition error BSSE free second-order perturbation theoretical schemes were developed by us that are being based on the chemical Hamiltonian Ε½ . approach CHA . Using these CHA-MP2 and CHA-PT2 methods, a comparison is made between th
## A clus7er~exponzisn for the nth orqi c: correcrion fo rhe enqy of a mapy-elecrron atom is derived. A possible ap plic;ltion to the calculaticn of the t&d or&r correction to the energy is considuert.