Non-invasive detection of molecular bonds in quantum dots
arXiv:0807.5095 · doi:10.1103/PhysRevB.78.153310
Abstract
We performed charge detection on a lateral triple quantum dot with star-like geometry. The setup allows us to interpret the results in terms of two double dots with one common dot. One double dot features weak tunnel coupling and can be understood with atom-like electronic states, the other one is strongly coupled forming molecule-like states. In nonlinear measurements we identified patterns that can be analyzed in terms of the symmetry of tunneling rates. Those patterns strongly depend on the strength of interdot tunnel coupling and are completely different for atomic- or molecule-like coupled quantum dots allowing the non-invasive detection of molecular bonds.
4 pages, 4 figures
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- Two-qubit logical operations in three quantum dots system
- Circular-polarization sensitive metamaterial based on triple quantum-dot molecules
- Optical properties and single-electron states of the nanosystem that contains three quantum dots