Ground-state Correlation Effects in Extended RPA Calculations
A. Mariano, F. Krmpotić, A. F. R. de Toledo Piza
Abstract
We study normalization problems associated with use of perturbatively correlated ground-states in extended RPA schemes in the context of a specific but typical example. The sensitivity of the results to the amount of 2p2h admixtures to the correlated ground state is also investigated in terms of a modification of the standard perturbative approach.
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