Transport Spectroscopy of a Spin-Coherent Dot-Cavity System

Quantum engineering requires controllable artificial systems with quantum coherence exceeding the device size and operation time. This can be achieved with geometrically confined low-dimensional electronic structures embedded within ultraclean materials, with prominent examples being artificial atom...

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Bibliographic Details
Published in:Physical review letters 2015-10, Vol.115 (16), p.166603-166603, Article 166603
Main Authors: Rössler, C, Oehri, D, Zilberberg, O, Blatter, G, Karalic, M, Pijnenburg, J, Hofmann, A, Ihn, T, Ensslin, K, Reichl, C, Wegscheider, W
Format: Article
Language:English
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Summary:Quantum engineering requires controllable artificial systems with quantum coherence exceeding the device size and operation time. This can be achieved with geometrically confined low-dimensional electronic structures embedded within ultraclean materials, with prominent examples being artificial atoms (quantum dots) and quantum corrals (electronic cavities). Combining the two structures, we implement a mesoscopic coupled dot-cavity system in a high-mobility two-dimensional electron gas, and obtain an extended spin-singlet state in the regime of strong dot-cavity coupling. Engineering such extended quantum states presents a viable route for nonlocal spin coupling that is applicable for quantum information processing.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.115.166603