Abstract

The successive coupled-cluster approximation up to the third level is applied to study the ground state of the linear E-e Jahn-Teller effect. Over the whole range of the coupling parameter, our results for the ground-state energy are not only in good agreement with the exact numerical diagonalization results, but they are also better than those from earlier analytical studies. The mathematical treatment in this work is quite simple and could be easily extended to the studies of the more complicated Jahn-Teller systems.

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