エンジニアリングによる分散による安定した量子相関の多体状態
X Mi1, A A Michailidis2, S Shabani1
1Google Research, Mountain View, CA, USA.
まとめ
エンジニアリングによる分散は シミュレーションのための 絡み合った量子状態を準備します この方法は,騒々しい量子プロセッサのユニタリー進化のスケーラブルな代替案を提供し,複雑な量子モデルの探索を可能にします.
科学分野:
- 量子物理学
- 凝縮物質物理学
- 量子情報科学
背景:
- エンジニアリングされた消耗貯水池は,多体量子システムを有用な相関安定状態に導くことができます.
- これらの状態は量子シミュレーション,特に高温超伝導性と量子磁力学において価値があります.
研究 の 目的:
- エンジニアリングによる分散を用いた多体量子システムの低エネルギー状態の準備を実証する.
- 超伝導量子プロセッサでのこのアプローチのスケーラビリティと有効性を探求する.
主な方法:
- 49個の超伝導クビットを活用して 量子システムと消耗的補助クビットを結合した.
- 横場イッシングモデルの低エネルギー状態を準備し,量子ハイゼンベルグモデルで輸送を調査した.
主要な成果:
- 1Dシステムの臨界点における18個の量子ビットに対して,長距離の量子相関と高基底状態の精度 (0.86) を観測した.
- 最寄りの隣人を超えた 相互情報を検出した 2次元システム
- 異なる化学的ポテンシャルを持つ貯水池と結合して量子輸送を成功裏に探求した.
結論:
- エンジニアリングによる分散は,絡み合った多体状態を準備するための実行可能でスケーラブルな方法です.
- このテクニックは,騒々しい量子プロセッサでの量子シミュレーションのための単体進化の有望な代替手段を提供します.
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