Pauli effects on "variational" calculations in nuclear matter

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Abstract
The difficulties which arise in the conventional development of the Jastrow method for fermions, from the failure to impose proper wave-function antisymmetry, are exhibited by an extension of the diagrammatic analysis of Pandharipande and Bethe. These problems are readily solved by the use of second quantization and a corresponding modification of the usual cluster expansion. A numerical example for a strong repulsive interaction shows that inaccurate treatment of the antisymmetrization can lead to very large errors in low-order estimates of the energy.