title: Spin-orbit-mediated manipulation of heavy-hole spin qubits in gated semiconductor nanodevices.
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.
authors.affiliation: Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Szumniak
authors.forename: S
authors.initials: S
authors.lastname: Bednarek
authors.forename: B
authors.initials: B
authors.lastname: Partoens
authors.forename: F M
authors.initials: FM
authors.lastname: Peeters