Operation of quantum cellular automaton cells with more than two electrons
Michele Girlanda, Michele Governale, Massimo Macucci, Giuseppe Iannaccone · Applied Physics Letters · 1999
We present evidence that operation of quantum cellular automaton (QCA) cells with four dots is possible with an occupancy of 4N+2 electrons per cell (N being an integer). We show that interaction between cells can be described in terms of a revised formula for cell polarization, which is based only on the difference between diagonal occupancies. We validate our conjectures with full quantum simulations of QCA cells for a number of electrons varying from 2 to 6, using the configuration–interaction method.