量子相拡大
O Hosten1, R Krishnakumar1, N J Engelsen1
1Department of Physics, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|June 25, 2016
まとめ
この研究は,低騒音検出器を必要とせずに,絡み合った状態を使用して測定精度を高める新しい量子計測法を導入しています. 先進的な量子感知を より容易に行えるようにしました
科学分野:
- 量子物理学
- 量子情報科学
- 計測学と測定科学
背景:
- 量子メトロロジーは 絡み合った粒子を使って クラシックな検知精度の限界を 超えています
- 従来のエンタグリング強化測定では 標準の量子限界を下回る低騒音検出システムが必要です
- 既存の技術は,厳しい騒音要求により実装に問題があります.
研究 の 目的:
- 絡み合いを強化した測定のための新しい,広く適用可能な方法を実証する.
- 量子計測における低騒音検出の要求を克服する.
- 量子センシング技術の実装を簡素化する
主な方法:
- 量子相拡大技術の開発
- この拡大ステップをエンタグレメント強化測定プロトコルに統合する.
- 圧縮状態メトロロジーを用いた実験的実現.
主要な成果:
- 低騒音検出なしで 絡み合いを強化した検出の成功実証
- 標準量子限界より8デシベル低い
- 標準的な量子限界より 10デシベル高い 低騒音の検出システムを使いました
結論:
- 提案された方法は,量子メトロロジーの実装の複雑さを大幅に削減します.
- この技術は,絡み合いを強化した測定の適用範囲を拡大します.
- アクセシブルな技術で標準以下の量子極限精度を達成するための 実践的な経路を提供します
関連する概念動画
01:26Phase Contrast and Differential Interference Contrast Microscopy
15.0K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
15.0K
01:18Imaging Biological Samples with Optical Microscopy
12.1K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
12.1K
01:20The Phase Rule
52
The phase rule describes the relationship between the variance (degrees of freedom), the number of components, and the number of phases in a system at equilibrium.Variance is a concept that denotes the number of independent intensive properties (properties are those that do not depend on the amount of material in the system), such as temperature, pressure, and composition, that can be altered without impacting the number of phases in equilibrium.In a single-component system, such as pure water,...
52