Many-body approach to the properties of interacting atoms
- Resource Type
- Authors
- N. C. Dutta; T. Ishihara; C. Matsubara; T. P. Das
- Source
- International Journal of Quantum Chemistry. 4:367-380
- Subject
- Chemistry
chemistry.chemical_element
Hydrogen atom
Function (mathematics)
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
Many body
Many-body problem
symbols.namesake
Polarizability
Physics::Atomic and Molecular Clusters
symbols
Physics::Atomic Physics
Physical and Theoretical Chemistry
van der Waals force
Atomic physics
Refractive index
Helium
- Language
- ISSN
- 1097-461X
0020-7608
The Brucckner-Goldstone many-body theory has been adapted to time-dependent perturbations and is utilized to study the frequency-dependent polarizability αHe(ω) of helium. The calculated αHe(ω) is compared with experimentally available refractive index data. The polarizability function αHe(ω) for imaginary frequencies has also been calculated by the extension of this procedure. Using this function αH(ω) for the hydrogen atom, we obtained for the Van der Waals dipole-dipole constants, CHH = 6.49903, CHHe = 2.820 and CHeHe = 1.500 (all in units of e2a50) in excellent agreement with experiment.