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. 2016 Dec 7;6:38095. doi: 10.1038/srep38095

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Copyright © 2016, The Author(s)

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Success probability of Grover’s QSA, when quantum noise occurs (a) only before the Oracle, (b) only right after the Oracle, (c) only before and right after the Oracle, (d) in all locations on Grover’s operator’s circuit, shown in Fig. 1, with respect to the depolarizing probability of the channels, when the architecture of Fig. 2 was used. Steane code with rate R = 1/7 has been employed for improving the performance of Grover’s QSA. Randomly generated databases with different sizes N were used, while a single solution S = 1 was present in a random position in the database in each search problem.