Deterministic polynomial-time quantum algorithms for Simon's problem

  • Authors:
  • Takashi Mihara;Shao Chin Sung

  • Affiliations:
  • Department of Management Science, Kyushu Tokai University, 9-1-1, Toroku, Kumamoto, 862-8652, Japan;School of Information Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai Tatsunokuchi Nomi, Ishikawa, 923-1292, Japan

  • Venue:
  • Computational Complexity
  • Year:
  • 2004

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Abstract

D. R. Simon stated a problem, so-called Simon's problem, whose computational complexity is in the class BQPφ but not in BPPφ, where φ is the function or oracle given in the problem. This result indicates that BPP may be strictly included in its quantum counterpart, BQP. Later, G. Brassard and P. Høyer showed that Simon's problem and its extended version can be solved by a deterministic polynomial time quantum algorithm. That is, these problems are in the class EQPφ. In this paper, we show that Simon's problem and its extended version can be deterministically solved in a simpler and more concrete way than that proposed by G. Brassard and P. Høyer.