Particle-Number Projection and the Density Functional Theory

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.76.054315· OSTI ID:932099

Dobaczewski, J. ^[1]; Stoitsov, Mario ^[2]; Nazarewicz, Witold ^[2]; Reinhard, P. -G. ^[3]

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1. Warsaw University
2. ORNL
3. Universitat Erlangen, Germany

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 932099
• Journal Information: Physical Review C, Vol. 76, Issue 5
• Country of Publication: United States
• Language: English