Publication
Physics Letters A
Paper

A note on the quantum-statistical Brillouin-Wigner perturbation theory

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Abstract

The Brillouin-Wigner form of quantum statistical perturbation theory is developed. This gives a better convergence to expansions used to calculate the thermodynamic functions of many-particle systems. The method is demonstrated on the linked-cluster expansion for the free energy of a system of conduction electrons interacting with a magnetic ion. © 1967.

Date

16 Jan 1967

Publication

Physics Letters A

Authors

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