Coherent single electron spin control in a slanting Zeeman field

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 pseudo-spin 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 C-NOT operation can be realized. We estimated relaxation ($T_1$) and coherence ($T_2$) times, and the (tunable) quality factor. This scheme implies important experimental advantages for single electron spin control.

4 pages, 3 figures

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