Abstract

Quantum computers are believed to perform high-speed calculations, compared with conventional computers. However, the quantum computer has inherent issues. Firstly, it solves NP (non-deterministic polynomial) problems at a high speed only when a periodic function can be used in the process of calculation. Secondly, it is extremely difficult to increase the problem scale to be solved, which is determined by the number of quantum bits. To overcome the restrictions stemming from the quantum algorithm, we are studying the emulation by a FPGA (field programmable gate array). In this paper, first, it is explained why a periodic function is required for the algorithm of a quantum computer. Then, it is shown that the hardware emulator can solve NP problems at a high speed without using a periodic function.

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