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arXiv · 1609.03381

Mapping the Chemical Potential Landscape of a Triple Quantum Dot

M. A. Broome·S. K. Gorman·J. G. Keizer·T. F. Watson·S. J. Hile·W. J. Baker·M. Y. Simmons
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Abstract

We investigate the non-equilibrium charge dynamics of a triple quantum dot and demonstrate how electron transport through these systems can give rise to non-trivial tunnelling paths. Using a real-time charge sensing method we establish tunnelling pathways taken by particular electrons under well-defined electrostatic configurations. We show how these measurements map to the chemical potentials for different charge states across the system. We use a modified Hubbard Hamiltonian to describe the system dynamics and show that it reproduces all experimental observations.

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M. A. Broome, S. K. Gorman, J. G. Keizer, T. F. Watson, S. J. Hile, W. J. Baker, M. Y. Simmons. 2016-09-12. Mapping the Chemical Potential Landscape of a Triple Quantum Dot. https://doi.org/10.1103/physrevb.94.054314

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