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Unitary transformations of the group U(N) and diagonalization of multilevel Hamiltonians

✍ Scribed by V. V. Val'kov


Book ID
112462177
Publisher
SP MAIK Nauka/Interperiodica
Year
1988
Tongue
English
Weight
590 KB
Volume
76
Category
Article
ISSN
0040-5779

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Connections between perturbation theory
✍ Paul Westhaus πŸ“‚ Article πŸ“… 1981 πŸ› John Wiley and Sons 🌐 English βš– 492 KB

## Abstract The connections between open shell Brillouin–Wigner perturbation theory and the Van Vleck unitary transformation formalisms for generating effective Hamiltonians are explored. An explicit expression is obtained relating the generator __Ŝ__ of the unitary transformation __e__^__iŝ__^ wit