**L.E. Fedichkin, M.V. Yanchenko, K.A. Valiev**

Novel coherent quantum bit Using spatial quantization levels in semiconductor quantum dot.

Novel coherent quantum bit Using spatial quantization levels in semiconductor quantum dot.

As basic elements of the quantum computer - quantum bits (qubits) we offer semiconductor quantum dots containing one electron each and consisting each of two tunnel-connected parts. The numerical solution of a Schroedinger equation with the account of Coulomb field of adjacent electrons shows, that in such structures the realization of a full set of basic logic operations which are necessary for fulfillment of quantum computations is possible. Durations of one- and two-qubit operations versus qubit geometry are obtained. Decoherence rates due to spontaneous emission of photons and acoustic phonons (due to both piezoelectric and deformation electron-phonon interaction) are evaluated. Analysis of these rates shows the offered qubit to be coherent enough to perform error correction procedures.

Citation: | L.E. Fedichkin, M.V. Yanchenko, K.A. Valiev, Novel coherent quantum bit Using spatial quantization levels in semiconductor quantum dot., Quantum Computers and Computing, 2000, 1 (1), pp. 58-76. |

Full text: | PS (942 Kb, in Russian) |