EXPERIMENTAL DEMONSTRATION OF QUANTUM-DOT CELLULAR-AUTOMATA

We present the experimental demonstration of a basic cell of quantum-d ot cellular automata (QCA), a transistorless computation paradigm whic h addresses the issues of device density and interconnection. The devi ce presented is a six-dot quantum-dot cellular system consisting of a four-dot QCA cell and two electrometer dots. The system is fabricated using metal dots which are connected by capacitors and tunnel junction s. The operation of a basic cell is confirmed by the externally contro lled polarization change of the cell. The cell exhibits a bistable res ponse, with more than 80% polarization of the charge within a cell.