Bell-state correlations in current of local Fermi liquid
arXiv:1810.13032 · doi:10.1103/PhysRevB.99.155106
Abstract
We study Bell-state correlations for quasiparticle pairs excited in nonlinear current through a double quantum dot in the Kondo regime. Exploiting the renormalized perturbation expansion in the residual interactions of the local Fermi liquid and Bell's inequality for cross correlation of spin currents through distinct conduction channels, we derive an asymptotically exact form of Bell's correlation for the double dot at low bias voltages. We find that pairs of quasiparticles and holes excited by the residual exchange interaction can violate Bell's inequality for the cross correlations of the spin currents.
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