Studying compatibilities between quantum cellular automata and Kane's semiconductor based quantum computer
Dimitris Ntalaperas, Nikos Konofaos · Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics · 2008
Abstract The aim of our work is to demonstrate a way of combining two different methods of achieving Quantum Computation: a) Kane's semiconductor based quantum computer and b) Quantum Cellular Automata (QCA). In our work, we demonstrate the physics, we propose the model and the circuit and we estimate the error in computation. The amount of error due to decoherence is estimated as a function of the input size and a lower bound for that size is given for which the proposed circuit can calculate in an error free mode, provided that in our simulated system the decoherence times for a single qubit (tϕ) predicted by Kane are applied. The numerical values are tϕ= 103sec, and for the error fidelity e = 10‐5, which are within the limits of the values proposed by the Kane computer. Hence, in our case, compatibility between QCAs and Kane implementation is shown to be feasible. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)