Spin-Orbit-Mediated Manipulation of Heavy-Hole Spin Qubits in Gated Semiconductor Nanodevices

P. Szumniak, S. Bednarek, B. Partoens, and F. M. Peeters
Phys. Rev. Lett. 109, 107201 – Published 4 September 2012

Abstract

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.

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  • Received 10 February 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.107201

© 2012 American Physical Society

Authors & Affiliations

P. Szumniak1,2, S. Bednarek1, B. Partoens2, and F. M. Peeters2

  • 1Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
  • 2Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium

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Issue

Vol. 109, Iss. 10 — 7 September 2012

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