Bends in nanotubes allow electric spin control and coupling

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Abstract

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.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume81
Issue number19
Pages (from-to)195418
Number of pages6
ISSN0163-1829
DOIs
Publication statusPublished - 15 May 2010

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