Highly Tunable Hybrid Quantum Dots with Charge Detection

Details Highly Tunable Hybrid Quantum Dots with Charge Detection Highly Tunable Hybrid Quantum Dots with Charge Detection

2010-09-14

arxiv.org/abs/1009.2578v1

Appl. Phys. Lett. 97, 152109 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.3501977

In order to employ solid state quantum dots as qubits, both a high degree of control over the confinement potential as well as sensitive charge detection are essential. We demonstrate that by combining local anodic oxidation with local Schottky-gates, these criteria are nicely fulfilled in the resulting hybrid device. To this end, a quantum dot with adjacent charge detector is defined. After tuning the quantum dot to contain only a single electron, we are able to observe the charge detector signal of the quantum dot state for a wide range of tunnel couplings.

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