関連する実験動画
Updated: Feb 27, 2026

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.8K
チップ上での高次元の絡み合った量子状態の生成とその一貫した制御
Michael Kues1,2, Christian Reimer1, Piotr Roztocki1
1Institut National de la Recherche Scientifique - Centre Énergie, Matériaux et Télécommunications (INRS-EMT) 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, Canada.
Nature
|June 29, 2017
まとめ
研究者は,統合フォトニクスを使用して,高次元の絡み合ったクディット状態のオンチップ生成を実証しています. この画期的な発見により 量子情報処理の能力と制御が向上し 強力な量子技術への道が開けています
科学分野:
- 量子情報科学
- 統合フォトニクス
- 量子光学
背景:
- 高次元の量子状態 (クディット) は量子力学,イメージング,通信,シミュレーション,計算の進歩に不可欠です.
- 統合フォトニクスは,量子状態の生成と処理のためのコンパクトで安定したプラットフォームを提供していますが,量子ビットに限定されています.
- 量子状態のエンタグリングは 次世代の量子技術の重要な課題です
研究 の 目的:
- 混乱状態のオンチップ生成を実証する.
- 高次元の周波数で絡み合った状態の 協調的な操作と制御のためのプラットフォームを開発する.
- ベル不等式と量子トモグラフィーで プラットフォームの能力を検証する
主な方法:
- 融合フォトニクスを用いて,フォトンが複数の周波数モードの叠加状態にある,絡み合ったクディット状態の生成.
- 整合的な操作と制御のために,標準的な電気通信コンポーネントを使用します.
- ベル不等式違反測定と量子状態トモグラフィの検証を行う.
主要な成果:
- 少なくとも100次元 (D=10クディット) の量子システムを達成する,絡み合ったクディット状態のオンチップ生成が実証された.
- 周波数絡み状態の決定的高次元ゲート操作のための一貫した操作プラットフォームを導入しました.
- 実験的な測定でプラットフォームの性能を検証した.
結論:
- この作業により,統合された光子チップ上の単一の空間モード内で高次元量子状態の生成と処理が可能になります.
- 開発されたプラットフォームは以前の制限を克服し,より強力でスケーラブルな量子情報処理の道を開きます.
- この進歩は 量子コンピューティング,通信,センシングの 将来の応用に不可欠です
関連する概念動画
The Entropy as a State Function
11
Consider an arbitrary process that moves between two specific states (A and B) in a cyclic manner. This process is reversible and broken down into smaller parts that each follow a Carnot cycle. A Carnot cycle has two isothermal (constant temperature) processes. During these processes, the ratio of the amount of heat transferred to their respective temperature remains constant. The other two processes in the Carnot cycle are also reversible but adiabatic, which means they occur without any heat...
11
Combinatorial Gene Control
9.8K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
9.8K
Fermi Level Dynamics
845
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
845
State Space Representation
630
The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
Consider an RLC circuit, a...
630
Carrier Generation and Recombination
1.4K
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
1.4K
The Quantum-Mechanical Model of an Atom
60.2K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
60.2K

