Charge on the quantum dot in the presence of tunneling current

Abstract

The calculation of the charge present in central region of the double barrier structure at non-equilibrium conditions is discussed. We propose here a simple method to calculate non equilibrium Green's functions which allows consistent calculations of retarded and distribution functions. To illustrate the approach we calculate the charge on the quantum dot coupled {\it via} tunnel barriers to two external leads having different chemical potentials ${\mu }_L$ and ${\mu }_R$. The obtained results have been compared with other approaches existing in the literature. They all agree in the equilibrium situation and the departures grow with increasing the difference ${\mu }_L-{\mu }_R$.

9 pages, 2 (.eps) figures, to be published in Solid State Commun

References in corpus (2)

• A Tunable Kondo Effect in Quantum Dots
• Mesoscopic Coulomb Blockade in One-channel Quantum Dots

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