Mapping the Chemical Potential Landscape of a Triple Quantum Dot
arXiv:1609.03381 · doi:10.1103/PhysRevB.94.054314
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.
7 pages, 3 figures
References in corpus (7)
- Single-shot read-out of an individual electron spin in a quantum dot
- Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
- Coherent spin manipulation in an exchange-only qubit
- A few-electron quadruple quantum dot in a closed loop
- Tunneling through triple quantum dots with mirror symmetry
- Dephasing-assisted transport in linear triple quantum dots
- Time-resolved charge detection with cross-correlation techniques