Novel coherent quantum bit using spatial quantization levels in semiconductor quantum dot
Abstract
As basic elements of the quantum computer  quantum bits (qubits) we offer semiconductor quantum dots containing one electron each and consisting each of two tunnelconnected 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 twoqubit operations versus qubit geometry are obtained. Decoherence rates due to spontaneous emission of phonons and acoustic phonons (both piezoelectric and deformation) are evaluated. Analysis of these rates shows the offered qubit to be coherent enough to perform error correction procedures.
 Publication:

arXiv eprints
 Pub Date:
 June 2000
 arXiv:
 arXiv:quantph/0006097
 Bibcode:
 2000quant.ph..6097F
 Keywords:

 Quantum Physics;
 Condensed Matter  Mesoscopic Systems and Quantum Hall Effect;
 Physics  Computational Physics
 EPrint:
 16 pages, 14 figures, LaTeX, figure captions were corrected