Defect Tolerance Properties Cal\-cu\-lations for Quan\-tum-dot Cellular Auto\-mata using Inter\--cellular Hartree Approximation

A numerical study of the fabrication defects influence on Quantum-dot Cellular Automata (QCA) operation is presented. The statistical model that has been introduced simulates the random distribution of positional defects of the dots within cells, and of cells within arrays. We have studied specific non-clocked QCA devices using Inter-cellular Hartree Approximation, for different temperatures. Parameters such as success rate and breakdown displacement factor were defined and calculated numerically. Results show the thermal dependence of breakdown displacement factor of the QCA devices. The breakdown displacement factor decreases with the temperature. The work has been supported by the Indiana 21$^{st}$ Century Research and Technology Fund ({\#} 04-492)