Title :
Quantum cellular automata: the physics of computing with arrays of quantum dot molecules
Author :
Lent, Craig S. ; Tougaw, P.Douglas ; Porod, Wolfgang
Author_Institution :
Dept. of Electr. Eng., Notre Dame Univ., IN, USA
Abstract :
We discuss the fundamental limits of computing using a new paradigm for quantum computation, cellular automata composed of arrays of coulombically coupled quantum dot molecules, which we term quantum cellular automata (QCA). Any logical or arithmetic operation can be performed in this scheme. QCA´s provide a valuable concrete example of quantum computation in which a number of fundamental issues come to light. We examine the physics of the computing process in this paradigm. We show to what extent thermodynamic considerations impose limits on the ultimate size of individual QCA arrays. Adiabatic operation of the QCA is examined and the implications for dissipationless computing are explored
Keywords :
cellular automata; physics; physics computing; quantum theory; QCA; QCA arrays; adiabatic operation; arithmetic operation; coulombically coupled quantum dot molecules; dissipationless computing; physics computing; physics of computing; quantum cellular automata; quantum computation; quantum dot molecule arrays; thermodynamic considerations; Carrier confinement; Concrete; Electrons; Physics computing; Quantum cellular automata; Quantum computing; Quantum dots; Robustness; Thermodynamics; US Department of Transportation;
Conference_Titel :
Physics and Computation, 1994. PhysComp '94, Proceedings., Workshop on
Conference_Location :
Dallas, TX
Print_ISBN :
0-8186-6715-X
DOI :
10.1109/PHYCMP.1994.363705