Remarks on the use of projected densities in the density dependent part of Skyrme or Gogny functionals

Details Remarks on the use of projected densities in the density dependent part of Skyrme or Gogny functionals Remarks on the use of projected densities in the density dependent part of Skyrme or Gogny functionals

2010-03-15

arxiv.org/abs/1003.3043v1

Physics

Nuclear Physics

Nuclear Theory

To be published as a contribution to J. Phys G, Special Issue, Focus Section: Open Problems in Nuclear Structure

Scientific paper

I discuss the inadequacy of the "projected density" prescription to be used in density dependent forces/functionals when calculations beyond mean field are pursued. The case of calculations aimed at the symmetry restoration of mean fields obtained with effective realistic forces of the Skyrme or Gogny type is considered in detail. It is shown that at least for the restoration of spatial symmetries like rotations, translations or parity the above prescription yields catastrophic results for the energy that drive the intrinsic wave function to configurations with infinite deformation, preventing thereby its use both in projection after and before variation.

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