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We study a single-level quantum dot in the presence of strong Coulomb interaction under nonequilibrium condition. By extending the equation of motion method to nonequilibrium, we study the transport behavior of the system when a dc bias voltage is applied to the leads. The spectral density exhibits two broad peaks centered around the normalized dot level energies and a split Kondo resonance at low temperature with two peaks pinned at the Fermi level of each lead. The approach allows one todoi:10.1088/1742-6596/592/1/012141 fatcat:hw6cckl4xncgpjzb65kbxvis5q