Exact mesoscopic correlation functions of the Richardson pairing model
| Authors |
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| Publication date |
2008
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| Journal |
Physical Review B
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| Article number |
064503
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| Volume | Issue number |
77 | 6
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| Number of pages |
13
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| Organisations |
-
Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for Theoretical Physics Amsterdam (ITFA)
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| Abstract |
We study the static correlation functions of the Richardson pairing model (also known as the reduced or discrete-state BCS model) in the canonical ensemble. Making use of the algebraic Bethe ansatz formalism, we obtain exact expressions which are easily evaluated numerically for any value of the pairing strength up to large numbers of particles. We provide explicit results at half-filling and extensively discuss their finite-size scaling behavior.
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| Document type |
Article
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| Language |
English
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| Published at |
https://doi.org/10.1103/PhysRevB.77.064503
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