Lower-bound estimates for the ground-state energy of the helium atom are determined using nonlinear programming techniques. Optimized lower bounds are determined for single-particle, radially correlated, and general correlated wave functions. The local nature of the method employed makes it a very s
โฆ LIBER โฆ
Squeezed-state approach for ground state of a tunneling particle coupled to boson excitations
โ Scribed by A.M. Jayannavar
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 217 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0038-1098
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ASE wavefunctions containing singIy excited (SE) configurations for each space orbital of the principal configuration are compared with similarly constructed pair-excitation (PE) xvavefunctions. The energies ale exactly or almost the same. Near-redundant configurations are removed. and the equivaien