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Planar N=4 Gauge Theory and the Hubbard Model

Adam Rej, Didina Serban, Matthias Staudacher

hep-tharXiv:hep-th/0512077

Abstract

Recently it was established that a certain integrable long-range spin chain describes the dilatation operator of N=4 gauge theory in the su(2) sector to at least three-loop order, while exhibiting BMN scaling to all orders in perturbation theory. Here we identify this spin chain as an approximation to an integrable short-ranged model of strongly correlated electrons: The Hubbard model.

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