Spin-orbit-mediated manipulation of heavy-hole spin qubits in gated semiconductor nanodevices

A novel spintronic nanodevice is proposed that is able to manipulate the single heavy-hole spin state in a coherent manner. It can act as a single quantum logic gate. The heavy-hole spin transformations are realized by transporting the hole around closed loops defined by metal gates deposited on top...

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Bibliographic Details
Published in:Physical review letters 2012-09, Vol.109 (10), p.107201-107201, Article 107201
Main Authors: Szumniak, P, Bednarek, S, Partoens, B, Peeters, F M
Format: Article
Language:English
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Summary:A novel spintronic nanodevice is proposed that is able to manipulate the single heavy-hole spin state in a coherent manner. It can act as a single quantum logic gate. The heavy-hole spin transformations are realized by transporting the hole around closed loops defined by metal gates deposited on top of the nanodevice. The device exploits Dresselhaus spin-orbit interaction, which translates the spatial motion of the hole into a rotation of the spin. The proposed quantum gate operates on subnanosecond time scales and requires only the application of a weak static voltage which allows for addressing heavy-hole spin qubits individually. Our results are supported by quantum mechanical time-dependent calculations within the four-band Luttinger-Kohn model.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.107201