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関連する概念動画

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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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...
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NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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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...
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Photoluminescence: Applications01:14

Photoluminescence: Applications

1.3K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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量子アプリケーションのためのコヒーレント光学パルスシーケンサー

Mahdi Hosseini1, Ben M Sparkes, Gabriel Hétet

  • 1ARC Centre of Excellence for Quantum-Atom Optics, Department of Quantum Science, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.

Nature
|September 11, 2009
PubMed
まとめ
この要約は機械生成です。

研究者らは,光子エコーを用いた新しいコヒーレント光学メモリを開発した. このシステムは,任意の順序で複数の光パルスを保存し,リコールすることができ,量子情報処理の可能性がある.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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科学分野:

  • 光学とフォトニック
  • 量子情報科学とは,量子情報科学である.
  • 原子物理 原子物理学

背景:

  • 光学デバイスは,情報技術と通信において極めて重要です.
  • 光学フィールドの正確な制御は,光子技術にとって不可欠です.
  • 量子光学記憶は,原子記憶の進歩とともに,量子情報アプリケーションに不可欠である.

研究 の 目的:

  • フォトンエコーに基づいた一貫した光学メモリシステムを提示する.
  • 光パルスの任意の貯蔵と回収を実証するために.
  • 量子情報処理における潜在的な応用を探求する.

主な方法:

  • フォトンエコーを誘発するために制御された可逆不均質の拡大を使用します.
  • 特定の帯域幅内で複数の光パルスを保存するスキームを実装する.
  • タイム圧縮,タイムストレッチ,パルス分割の能力を実証する.

主要な成果:

  • 複数の古典的な光パルスの保存と回収に成功しました.
  • 調整可能な遅延で任意の注文リコールが実証されました.
  • パルス持続時間と断片を修正する能力が示されています.

結論:

  • 開発した技術は,多用途のコヒーレント光学メモリを可能にします.
  • この方法は,タイムビン量子情報のための光学ランダムアクセスメモリを構築するのに適しています.
  • この技術は,量子情報処理の進歩に期待を寄せている.