Coherent tunnelling through two quantum dots with Coulomb interaction
P. Pals, A.MacKinnon (The Blackett Laboratory, Imperial College,, London, United Kingdom)
TL;DR
This paper investigates quantum tunneling through two quantum dots with Coulomb interaction, demonstrating negative differential conductance and analyzing conductance behavior under various energy level configurations.
Contribution
It introduces a Hubbard model approach for single-level quantum dots and explores conductance phenomena beyond charge degeneracy points.
Findings
Negative differential conductance observed
Ohmic conductance calculated for equally spaced levels
Transport depends on energy level matching
Abstract
The coherent conductance and current is calculated through two quantum dots using the Hubbard model for a single level per spin. The occurrence of negative differential conductance is demonstrated. The Ohmic conductance is calculated for dots with equally spaced levels. Transport is determined by matching energy levels, even when they do not occur at the charge degeneracy points.
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