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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2010

Density-matrix functionals for pairing in mesoscopic superconductors

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David Lacroix
G. Hupin

Abstract

A functional theory based on single-particle occupation numbers is developed for pairing. This functional, that generalizes the Bardeen-Cooper-Schrieffer 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.

Dates and versions

in2p3-00464174 , version 1 (16-03-2010)

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David Lacroix, G. Hupin. Density-matrix functionals for pairing in mesoscopic superconductors. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 82, pp.144509. ⟨10.1103/PhysRevB.82.144509⟩. ⟨in2p3-00464174⟩
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