Coherent single electron spin control in a slanting Zeeman field

Yasuhiro Tokura, Wilfred Gerard van der Wiel, Toshiaki Obata, Seigo Tarucha

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    Abstract

    We consider a single electron in a 1D quantum dot with a static slanting Zeeman field. By combining the spin and orbital degrees of freedom of the electron, an effective quantum two-level (qubit) system is defined. This pseudospin can be coherently manipulated by the voltage applied to the gate electrodes, without the need for an external time-dependent magnetic field or spin-orbit coupling. Single-qubit rotations and the controlled-NOT operation can be realized. We estimated the relaxation (T1) and coherence (T2) times and the (tunable) quality factor. This scheme implies important experimental advantages for single electron spin control.
    Original languageUndefined
    Pages (from-to)047202
    Number of pages4
    JournalPhysical review letters
    Volume96
    Issue numberIEEE Produ
    DOIs
    Publication statusPublished - 3 Feb 2006

    Keywords

    • SMI-NE: From 2006 in EWI-NE
    • IR-59088
    • METIS-238794
    • EWI-9471

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