A note on density correlations in the half-filled Hubbard model

Details A note on density correlations in the half-filled Hubbard model A note on density correlations in the half-filled Hubbard model

1999-02-28

arxiv.org/abs/cond-mat/9903008v2

Phys. Rev. B60 (1999) 8540-8542

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, RevTeX

Scientific paper

10.1103/PhysRevB.60.8540

We consider density-density correlations in the one-dimensional Hubbard model at half filling. On intuitive grounds one might expect them to exhibit an exponential decay. However, as has been noted recently, this is not obvious from the Bethe Ansatz/conformal field theory (BA/CFT) approach. We show that by supplementing the BA/CFT analysis with simple symmetry arguments one can easily prove that correlations of the lattice density operators decay exponentially.

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