Wick's Theorem for Spin Operators and Its Relation to the Coupled-Fermion Representation
- 1 March 1966
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 37 (3) , 1451-1452
- https://doi.org/10.1063/1.1708511
Abstract
It is shown that Wick's theorem and the linked diagram expansion theorem for S = ½ operators (applied elsewhere by the authors to discuss antiferromagnetic spin waves) can be derived by a direct application of conventional theorems to the coupled‐fermion representation of spin operators.This publication has 4 references indexed in Scilit:
- Perturbation theory of antiferromagnetismPhysica, 1960
- Theory of Spin-Wave Interactions in Ferro- and AntiferromagnetismPhysical Review B, 1960
- An Approximate Quantum Theory of the Antiferromagnetic Ground StatePhysical Review B, 1952
- The Evaluation of the Collision MatrixPhysical Review B, 1950