Bends In Nanotubes Allow Electric Spin Control and Coupling

Details Bends In Nanotubes Allow Electric Spin Control and Coupling Bends In Nanotubes Allow Electric Spin Control and Coupling

2010-02-26

arxiv.org/abs/1003.0037v2

Phys. Rev. B 81, 195418 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

10.1103/PhysRevB.81.195418

We investigate combined effects of spin-orbit coupling and magnetic field in carbon nanotubes containing one or more bends along their length. We show how bends can be used to provide electrical control of confined spins, while spins confined in straight segments remain insensitive to electric fields. Device geometries that allow general rotation of single spins are presented and analyzed. In addition, capacitive coupling along bends provides coherent spin-spin interaction, including between otherwise disconnected nanotubes, completing a universal set of one- and two-qubit gates.

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