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- Title
DENSITY FUNCTIONAL FOR PAIRING WITH PARTICLE NUMBER CONSERVATION.
- Authors
LACROIX, DENIS; HUPIN, GUILLAUME
- Abstract
In this work, a new functional is introduced to treat pairing correlations in finite many-body systems. Guided by the projected BCS framework, the energy is written as a functional of occupation numbers. It is shown to generalize the BCS approach and to provide an alternative to Variation After Projection framework. Illustrations of the new approach are given for the pairing Hamiltonian for various particle numbers and coupling strengths. In all case, a very good agreement with the exact solution is found.
- Subjects
DENSITY functionals; PAIRING correlations (Nuclear physics); ANGULAR correlations (Nuclear physics); NUCLEAR physics; QUANTUM theory
- Publication
Modern Physics Letters A, 2010, Vol 25, Issue 21-23, p1854
- ISSN
0217-7323
- Publication type
Article
- DOI
10.1142/S0217732310000484