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We study Bell-state correlations for quasiparticle pairs excited in nonlinearcurrent through a double quantum dot in the Kondo regime. Exploiting therenormalized perturbation expansion in the residual interactions of the localFermi liquid and Bell's inequality for cross correlation of spin currentsthrough distinct conduction channels, we derive an asymptotically exact form ofBell's correlation for the double dot at low bias voltages. We find that pairsof quasiparticles and holes excited by the residual exchange interaction canviolate Bell's inequality for the cross correlations of the spin currents.

Bell-state correlations in current of local Fermi liquid