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Lower bound to the free energy of an anisotropic linear Heisenberg chain

✍ Scribed by M.P. Kawatra; L.J. Kijewski

Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
155 KB
Volume
28
Category
Article
ISSN
0375-9601

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An application of the Brillouin–Löwdin p
An application of the Brillouin–Löwdin perturbation expansion: Lower bounds to the energy eigenvalues of the rigid rotator in an electric field
✍ D. Grau 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 536 KB

## Abstract One of the variants of Löwdin's partitioning technique that makes use of a Brillouin‐type perturbation expansion for the study of lower bounds to the eigenvalues of a Hamiltonian has not been applied to any practical quantum mechanical problem so far. To illustrate how powerful this met