Quantum-Dot Cellular Automata: Line and Majority Logic Gate
Gregory L. Snider, Alexei O. Orlov, Islamshah Amlani, Gary H. Bernstein, Craig S. Lent, James L. Merz, Wolfgang Porod · Japanese Journal of Applied Physics · 1999
An introduction to the operation of quantum-dot cellular automata is presented, along with recent experimental results. Quantum-dot cellular automata (QCA) is a transistorless computation paradigm that addresses the issues of device density and interconnection. The basic building blocks of the QCA architecture, such as AND, OR, and NOT are presented. The experimental devices presented are QCA cells where the dots are metal islands, coupled by capacitors and tunnel junctions. A line of three two-dot cells is presented, which demonstrates that there are no metastable states in a QCA line. The final experiment presented is a QCA majority gate, a programmable AND/OR logic gate.