未知ユニタリ演算変換のクエリ複雑性に関する解析的下限
Tatsuki Odake1, Satoshi Yoshida1, Mio Murao1,2
1The University of Tokyo, Department of Physics, Graduate School of Science, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.
Physical review letters
|December 19, 2025
まとめ
本研究は、反転や共役などのユニタリ演算のクエリ複雑性に関する解析的下限を確立する。この結果は、既存のプロトコルの最適性を示し、特定のメソッドの限界を明らかにする。
科学分野:
- 量子コンピューティング
- 線形代数
- 情報理論
背景:
- ユニタリ演算は量子計算の基本である。
- 未知のユニタリ演算を操作するための効率的なプロトコルは不可欠である。
- 以前の研究では、複素共役、反転、転置の決定論的プロトコルが確立されていた。
結論:
- 確立された下限は、未知のユニタリ演算を操作する効率性に関する基本的な限界を提供する。
- 決定論的厳密反転プロトコルは漸近的に最適である。
- 触媒プロトコルはユニタリ複素共役には実行可能ではなく、この演算特有の課題を強調している。
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