Connected moments expansion for the ground-state energy of systems described by nonlinear Hamiltonians
- 1 July 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 36 (1) , 374-376
- https://doi.org/10.1103/physreva.36.374
Abstract
An extension of the connected moments expansion to nonlinear Hamiltonians is presented. The new method enables construction of rapidly convergent series for the ground-state energy which requires a relatively small amount of numerical effort.Keywords
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