LOGICAL DEVICES IMPLEMENTED USING QUANTUM CELLULAR-AUTOMATA

We examine the possible implementation of logic devices using coupled quantum dot cells. Each quantum cell contains two electrons which inte ract Coulombically with neighboring cells. The charge distribution in each cell tends to align along one of two perpendicular axes, which al lows the encoding of binary information using the state of the cell. T he state of each cell is affected in a very nonlinear way by the state s of its neighbors. A line of these cells can be used to transmit bina ry information. We use these cells to design inverters, programmable l ogic gates, dedicated AND and OR gates, and non-interfering wire cross ings. Complex arrays are simulated which implement the exclusive-OR fu nction and a single-bit full adder.