Exact mesoscopic correlation functions of the pairing model

Details Exact mesoscopic correlation functions of the pairing model Exact mesoscopic correlation functions of the pairing model

2007-10-25

arxiv.org/abs/0710.4865v1

Phys. Rev. B 77, 064503 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 Pages, 12 figures

Scientific paper

10.1103/PhysRevB.77.064503

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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