相関フォトンの量子歩行
Alberto Peruzzo1, Mirko Lobino, Jonathan C F Matthews
1Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.
Science (New York, N.Y.)
|September 18, 2010
まとめ
研究者は,チップ上の2つの光子で量子歩行を実証し,強力な量子相関を観察しました. これは,より大きな状態空間で情報を符号化することによって,量子計算とシミュレーションを前進させます.
科学分野:
- 量子物理学とは,量子物理学のことです.
- 量子情報科学とは,量子情報科学である.
- 量子光学とは,量子光学である.
背景:
- 量子ウォークは,量子計算と複雑なシステムのシミュレーションに不可欠です.
- 量子散歩における相関粒子により,大規模な量子干渉が可能になる.
- 以前の研究では,量子ウォークが調査されていますが,相関粒子によるスケーリングは依然として課題です.
研究 の 目的:
- 統合された光子チップ内の2つの同一の光子の量子歩行を実証する.
- これらの歩行における量子相関と,入力状態への依存を調査する.
- 関連量子ウォークを用いた量子計算とシミュレーションの可能性を調査する.
主な方法:
- SiO (x) N (y) チップ上の21波導体配列の製造.
- 2フォトン状態の生成と操作.
- 量子相関の測定と古典的限界との比較.
主要な成果:
- 21波導体配列で2フォトンの量子ウォークを成功裏に実証しました.
- 古典的な限界 (76の標準偏差) を著しく破る量子相関の観測.
- 初期量子状態に対する相関の重要な依存性を実証した.
結論:
- フォトニックチップ上の相関量子ウォークは,量子情報処理のための強力なプラットフォームを提供します.
- 観測された量子相関は,強化された計算能力の可能性を強調しています.
- この研究は,量子シミュレーションとコンピューティングのために,非常に拡張された状態空間で情報をエンコードする道を開く.
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