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YKIS2011 : Frontier Issues in Physics of Exotic Nuclei, Kyoto : Japon (2011)
On the application of symmetry breaking and its restoration to treat pairing correlation in finite nuclei
G. Hupin1, D. Lacroix1
(2012)

An alternative approach to symmetry restoration within Energy Density Functional, the Symmetry-Conserving EDF is discussed. In this approach, the energy is directly written in terms of the degrees of freedom encoded in the one-, two-... body density matrices of the state having good quantum numbers. The SC-EDF framework is illustrated within Projection After and Before variation applied to particle number restoration.
1:  GANIL - Grand Accélérateur National d'Ions Lourds
Physics/Nuclear Theory
Fulltext link: 
http://fr.arXiv.org/abs/1203.3925