Coherent single electron spin control in a slanting Zeeman field.

نویسندگان

  • Yasuhiro Tokura
  • Wilfred G van der Wiel
  • Toshiaki Obata
  • Seigo Tarucha
چکیده

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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عنوان ژورنال:
  • Physical review letters

دوره 96 4  شماره 

صفحات  -

تاریخ انتشار 2006