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Theses

Transport d'un électron unique dans des nanostructures

Abstract : A global effort is pursued to realise a quantum computer. Such a dispositive will allow to implement faster algorithms for tasks like integer factoring and database search. It will also allow to simulate quantum system much more efficiently. than a classical system. This power gain necessitates to entangle a large number of qubits. This in turn requires the ability to transport a qubit in space. In this thesis, we demonstrate a first step: a single electron is transported on demand from one quantum dot to another quantum dot, micrometers away. The transport is realised thanks to a Surface Acoustic Wave (SAW) that drags the electron. The transfer is realised with an efficiency of 90 % and triggered within one nanosecond. These results open the way to the realisation of electron quantum optics experiments with an event per event detection. A work on the separation of two electron initially present in the quantum dot will lead to the generation of distant entangled particles.
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Submitted on : Monday, July 30, 2012 - 11:43:11 AM
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Sylvain Hermelin. Transport d'un électron unique dans des nanostructures. Physique [physics]. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENY011⟩. ⟨tel-00721761⟩

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