Particle-number projection and the density functional theory

被引：133
|
作者：
Dobaczewski, J. [1 ]
Stoitsov, M. V.
Nazarewicz, W.
Reinhard, P. -G.
机构：
[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[2] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA
[3] Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA
[4] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland
[5] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland
[6] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria
[7] Univ Erlangen Nurnberg, Inst Theoret Phys, D-91058 Erlangen, Germany
来源：
PHYSICAL REVIEW C | 2007年 / 76卷 / 05期
关键词：
D O I：
10.1103/PhysRevC.76.054315
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
In the framework of the density functional theory for superconductors, we study the restoration of the particle-number symmetry by means of the projection technique. Conceptual problems are outlined and numerical difficulties are discussed. Both are related to the fact that neither the many-body Hamiltonian nor the wave function of the system appear explicitly in the density functional theory. Similar obstacles are encountered in self-consistent theories utilizing density-dependent effective interactions.
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页数：16
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