Simulation of Quantum Automata Cellular Logic Devices for Quantum Logic Circuits E.N.Ganesh*

One of the challenges to scale down transistor size is leakage current through gate oxide. This leakage current results from quantum mechanical tunneling of electrons from the gate electrode through the oxide and in to the transistor channel. Instead of maintaining transistor functionality at smaller scales, a new technology called Quantum cellular automata technology is developed by Lent and Konrad Walus [1]. QCA technology consists of planar arrays of QCA cells, which are much smaller than smallest transistor. These devices rely on the quantum mechanical effects such as electron tunneling. This paper deals with the quantum computation and simulation of combinational and sequential logic circuits using QCA tool. The method used for computation is majorityvoting method. Walus already developed some of the basic logic gates [1] and we have developed combinational and sequential circuits using the majority voting method and QCA tools. These circuits are simulated and waveforms are presented for further study purpose. ________________________________________________________________________ *Author for correspondence: [email protected] Nano Trends: A Journal of Nanotechnology and its Applications Volume 2, Issue 1, JanuaryFebruary, Pages 11-31. 2007 --------------------------------------------------------------------------------------------------------------------------------ISSN 0973-418X © NSTC 2007. All Rights Reserved. 12 12