Coherent Single Electron Spin Control in a Slanting Zeeman Field


Tokura, Yasuhiro and Wiel, Wilfred G. van der and Obata, Toshiaki and Tarucha, Seigo (2006) Coherent Single Electron Spin Control in a Slanting Zeeman Field. Physical Review Letters, 96 (4). 047202. ISSN 0031-9007

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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.
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Copyright:© 2006 American Physical Society
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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