Romain Thalineau, Sylain Hermelin, Andreas D. Wieck, Christopher Bäuerle, Laurent Saminadayar, Tristan Meunier
We report the realization of a quadruple quantum dot device in a square-like configuration where a single electron can be transferred on a closed path free of other electrons. By studying the stability diagrams of this system, we demonstrate that we are able to reach the few-electron regime and to control the electronic population of each quantum dot with gate voltages. This allows us to control the transfer of a single electron on a closed path inside the quadruple dot system. This work opens the route towards electron spin manipulation using spin-orbit interaction by moving an electron on complex paths free of electrons
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http://arxiv.org/abs/1209.0733
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