Density-matrix functionals for pairing in mesoscopic superconductors
arXiv:1003.2860 · doi:10.1103/PhysRevB.82.144509
Abstract
A functional theory based on single-particle occupation numbers is developed for pairing. This functional, that generalizes the BCS approach, directly incorporates corrections due to particle number conservation. The functional is benchmarked with the pairing Hamiltonian and reproduces perfectly the energy for any particle number and coupling.
4 pages, 4 figures, revised version
References in corpus (7)
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Cited by in corpus (8)
- Projection on particle number and angular momentum: Example of triaxial Bogoliubov quasiparticle states
- Pair-transfer probability in open- and closed-shell Sn isotopes
- Description of Pairing correlation in Many-Body finite systems with density functional theory
- Possibility of Electron Pairing in Small Metallic Nanoparticles
- On the formulation of functional theory for pairing with particle number restoration
- Beyond mean-field calculation for pairing correlation
- Occupation number-based energy functional for nuclear masses
- Functional approach for pairing in finite systems: How to define restoration of broken symmetries in Energy Density Functional theory ?