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On the summation of the Brillouin-Wigner type perturbation series
K V Sane R P Saxena P K Srivastava
Quantum Mechanics Volume 13 Issue 1 July 1979 pp 9-14
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https://www.ias.ac.in/article/fulltext/pram/013/01/0009-0014 -
Keywords
Brillouin-Wigner series ;mean excitation energy approximation ;correlated trial function ;helium atom -
Abstract
It is shown that if the ‘mean excitation energy’ assumption is introduced in the Brillouin-Wigner perturbation series, then the resulting series can be exactly summed. The implications of the result for calculating energy shift and for constructing trial functions are examined with special reference to the ground state of the helium atom.
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Author Affiliations
K V Sane1 R P Saxena1 2 P K Srivastava1 2
- Department of Chemistry, University of Delhi, Delhi - 110 007
- Department of Physics, University of Delhi, Delhi - 110 007
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Dates
- Published
- July 1979
- Manuscript received
- 24 March 1979
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Pramana – Journal of Physics
Volume 95, 2021
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