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Updated: Oct 11, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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量子プロセッサの時間結晶固有状態の順序
Xiao Mi1, Matteo Ippoliti2, Chris Quintana1
1Google Research, Mountain View, CA, USA.
Nature
|November 30, 2021
まとめ
研究者らは,多体局所システムにおいて,離散時間結晶 (DTC) を実験的に観測した. この非均衡相は,超伝導量子ビットを使用して,均衡状態とは異なるユニークな時空秩序を示しています.
科学分野:
- 量子物理学
- 凝縮物質物理学
- 量子情報科学
背景:
- 量子多体系では 複雑な相が均衡状態にある.
- 非均衡のシステムは,離散時間結晶 (DTC) のような新しいダイナミック・フェーズをホストすることができます.
- これらのダイナミックな相を実験的に観察することは,一時的な行動のために困難です.
研究 の 目的:
- 実験的に多体局所化された離散時間結晶 (MBL-DTC) を観測する.
- 一般的な初期状態に対する MBL-DTC の特徴的な空間時間反応を実証する.
- 量子プロセッサの非均衡相を研究するためのスケーラブルな方法を確立する.
主な方法:
- 超伝導量子ビットに調節可能な制御相ゲート (CPHASE) の実装.
- 時間の逆転プロトコルを利用して 脱合効果を評価する.
- スペクトルサンプリングの課題を克服するために量子型性を採用します.
- 実験的な有限サイズの分析を行い,相変化を特定する.
主要な成果:
- 超伝導量子ビット配列におけるMBL-DTCの実験観測.
- 一般的な初期状態に対する MBL-DTC の特徴的な空間時間的応答の実証.
- デコヘレンスの影響と相変化の位置を成功裏に定量化した.
結論:
- この研究は,MBL-DTCを別々の非均衡段階として実験的証拠を提供します.
- 開発された方法は,新しい非均衡現象を研究するためのスケーラブルなアプローチを提供します.
- この発見は,熱の均衡を超えた量子相の理解を進めている.
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