A study of the connected moments expansions for the correlation energy via an exactly soluble problem
作者： J. Cioslowski
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摘要: The recently developed connected moment expansions (CMXS) for the ground state energy are tested on an exactly soluble N-body problem. For a weak correlation limit second order CMXS reproduce exactly, whereas strong they account half of energy. Going to higher orders, CMX-LT approximation appears be most effective one. results indicate that CMX technique should promising calculation other systems.
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