Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

2.8K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
2.8K
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

120
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
120
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

3.4K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.4K
Speed of a Transverse Wave01:13

Speed of a Transverse Wave

1.6K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
1.6K
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

107
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
107

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Prevalence, detection, and trajectory of combined pulmonary fibrosis and emphysema.

Chest·2026
Same author

Perioperative ctDNA as a prognostic biomarker in endometrial cancer - the CODEC study.

Translational oncology·2026
Same author

Clinical and Radiologic Characteristics of Familial Pulmonary Fibrosis.

Annals of the American Thoracic Society·2026
Same author

Associations of spirituality and craving among individuals in substance use disorder treatment: A latent change score modeling approach.

Drug and alcohol dependence·2026
Same author

Association of CT Features with Radiologic Patterns in Interstitial Lung Disease: Multinomial Analysis in CARE-PF.

Radiology·2026
Same author

Airborne dust exposure during the application of talc-based pressed powder makeups.

Journal of occupational and environmental hygiene·2026
Same journal

Keep the Hubble and James Webb Space Telescopes alive - the science is worth the price tag.

Nature·2026
Same journal

Say hello to hard helium.

Nature·2026
Same journal

How to avoid dementia - what the science really says.

Nature·2026
Same journal

Save Hubble: the race to preserve the space telescope kicks off.

Nature·2026
Same journal

How long can humans live? All evidence points to a maximum of 125 years.

Nature·2026
Same journal

Listen to Gen Z when it comes to AI in education.

Nature·2026
関連記事をすべて見る

関連する実験動画

Updated: Jul 26, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K

将来のジオシンクロンリンクのための量子限定光学時間転送

Emily D Caldwell1,2, Jean-Daniel Deschenes3, Jennifer Ellis1

  • 1National Institute of Standards and Technology (NIST), Boulder, CO, USA.

Nature
|June 21, 2023
PubMed
まとめ
この要約は機械生成です。

遠隔位置を320アト秒で同期することで 量子的に限られた光学的タイムトランスファーを達成しました この画期的な発見により 強力な空間のネットワークが 精密な時間分布と 先進的な科学的応用を可能にします

さらに関連する動画

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.0K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.6K

関連する実験動画

Last Updated: Jul 26, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K
Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.0K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.6K

科学分野:

  • 物理学
  • メトロロジー
  • 天文学

背景:

  • 光学的な時計と 光学的な時間転送は 先進的なネットワークの鍵です
  • 現在の光学的タイムトランスファーには 量子限られた性能がない
  • 地上と宇宙の光学時計をつなぐことで 新たな応用が可能になります

研究 の 目的:

  • 量子限られた性能で 光学時間の移転を証明する
  • 強固な空間の光学時間転送ネットワークを可能にします.
  • 時間同期のための受信電力の要求を減らすために.

主な方法:

  • 時間移転が証明された 量子限られた取得とタイミングで
  • 以前より1万倍低い電力を利用した.
  • 山頂から山頂まで 300キロの同期を達成しました

主要な成果:

  • 遠隔サイトを 320 アット秒で同期した
  • 1万倍も低い電力を使った
  • 光学時間移転で 量子制限に近い性能を達成した.

結論:

  • この方法は,限られた光子を持つ長距離の空間のリンクに不可欠です.
  • 4.0mWの送信電力で102dBのリンク損失をサポートしています.
  • 将来の地球同期軌道への移動を可能にします.