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We propose an entanglement mechanism of nuclear spins in quantum dots drivenby the electric current accompanied by the spin flip. This situation isrelevant to a leakage current in spin-blocked regions where electrons cannot betransported unless their spins are flipped. The current gradually increases thecomponents of larger total spin of nuclei. This correlation among the nuclearspins markedly enhances the spin-flip rate of electrons and hence the leakagecurrent. The enhancement of the current is observable when the residence timeof electrons in the quantum dots is shorter than the dephasing time T*_2 ofnuclear spins.Comment: 4 pages, 4 figure

Current-Induced Entanglement of Nuclear Spins in Quantum Dots