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Title
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Electron-hole symmetry and solutions of Richardson pairing model
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Author
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Abstract
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| Richardson approach provides an exact solution of the pairing Hamiltonian. This Hamiltonian is characterized by the electron-hole pairing symmetry, which is however hidden in Richardson equations. By analyzing this symmetry and using an additional conjecture, fulfilled in solvable limits, we suggest a simple expression of the ground state energy for an equally-spaced energy-level model, which is applicable along the whole crossover from the superconducting state to the pairing fluctuation regime. Solving Richardson equations numerically, we demonstrate a good accuracy of our expression. |
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Language
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English
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Source (journal)
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European physical journal : B : condensed matter and complex systems. - Berlin
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Publication
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Berlin
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2013
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ISSN
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1434-6028
[print]
1434-6036
[online]
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DOI
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10.1140/EPJB/E2013-40234-9
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Volume/pages
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86
:5
(2013)
, p. 1-6
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Article Reference
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235
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ISI
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000320286200044
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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