DENSITY FUNCTIONAL FOR PAIRING WITH PARTICLE NUMBER CONSERVATION

被引：0
|
作者：
Lacroix, Denis [1 ]
Hupin, Guillaume [1 ]
机构：
[1] GANIL, CEA & IN2P3, F-14076 Caen, France
来源：
MODERN PHYSICS LETTERS A | 2010年 / 25卷 / 21-23期
关键词：
Pairing; mesoscopic systems; particle number projection;
D O I：
10.1142/S0217732310000484
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页码：1854 / 1857
页数：4
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