Convergence of density-matrix expansions for nuclear interactions.
We extend density-matrix expansions in nuclei to higher orders in derivatives of densities and test their convergence properties. The expansions allow for converting the interaction energies characteristic to finite- and short-range nuclear effective forces into quasilocal density functionals. We also propose a new type of expansion that has excellent convergence properties when benchmarked against the binding energies obtained for the Gogny interaction.
Carlsson
B G
BG
Department of Physics, Post Office Box 35 (YFL), FI-40014 University of Jyväskylä, Finland.
Dobaczewski
J
J