Voltage-controlled coded qubit based on electron spin

Details Voltage-controlled coded qubit based on electron spin Voltage-controlled coded qubit based on electron spin

2004-11-20

arxiv.org/abs/cond-mat/0411535v2

Solid State Communications, vol. 136, pp. 508-512 (2005)

Physics

Condensed Matter

Materials Science

11 pages + 3 figures

Scientific paper

10.1016/j.ssc.2005.09.026

We design and analyze a solid state qubit based on electron spin and controlled by electrical means. The coded qubit is composed of a three-electron complex in three tunable gated quantum dots. The two logical states of a qubit, |0L> and |1L>, reside in a degenerate subspace of total spin S=1/2 states. We demonstrate how applying voltages to specific gates changes the one-electron properties of the structure, and show how electron-electron interaction translates these changes into the manipulation of the two lowest energy states of the three-electron complex.

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