VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013


 Nanophysics: from fundamentals to applications

(the return)


Tuesday 6
Quantum electronics, quantum information, electronic quantum optics, high frequency noise

› 15:30 - 16:00 (30min)
Phase control of electrons and on-demand single electron transport
Christopher Bauerle  1@  
1 : Institut Neel – CNRS and Université Joseph Fourier, 38042 Grenoble, France  (IN-CNRS)  -  Website
CNRS : UPR2940
25 rue des Martyrs, 38042 Grenoble -  France

In this talk, we will report on full electronic control of a solid-state flying qubit by employing an Aharonov-Bohm (AB) ring connected to two-channel wires with tunable tunnel coupling [1]. In addition to its application to quantum information, this original system can also act as a true two-path interferometer and allows us to address important problems of mesoscopic physics such as the phase shift across a Kondo impurity [2].

We will then show how such a system could be used to realize quantum optics experiments with single flying electrons. We demonstrate the first step towards this goal, namely the on demand single electron transfer between two distant quantum dots with very high fidelity using a sound wave [3,4]. Combining both schemes, this technology is opening an exciting platform for the transfer of quantum optics experiments to on chip solid-state devices


[1] M. Yamamoto, S. Takada, C. Bäuerle, K. Watanabe, A. D. Wieck & S. Tarucha, Nature Nanotechnology 7, 247-251 (2012);

[2] S. Takada, C. Bäuerle, M. Yamamoto, K. Watanabe, S. Hermelin, T. Meunier, A. Alex, A. Weichselbaum, J. von Delft, A.D. Wieck, S. Tarucha (in preparation)

[3] S. Hermelin, S. Takada, M. Yamamoto, S. Tarucha, A. D. Wieck, L. Saminadayar, C. Bäuerle and T. Meunier, Nature, 477, 7365 (2011)

[4] R. Mc Neil et al., Nature, 477, 7369 (2011)

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