Soliton Fermi sea in models of Ising-coupled Kondo impurities

Details Soliton Fermi sea in models of Ising-coupled Kondo impurities Soliton Fermi sea in models of Ising-coupled Kondo impurities

2002-08-20

arxiv.org/abs/cond-mat/0208390v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figs; (v2) conclusions regarding phase transition away from Toulouse point corrected; paper is superseded by cond-m

Scientific paper

We study a model of Ising-coupled Kondo impurities that can be applied to quantum dots with capacitance coupling, coupled qubits with an incoherent environment, etc. We show that this model becomes equivalent to a Anderson impurity model with a novel solitonic Fermi sea. We derive exact results at the Toulouse point, and use the flow equation method to extend this analysis away from the Toulouse point for not too large Ising couplings.

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