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関連する概念動画

Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Magnetic Moment of an Electron01:23

Magnetic Moment of an Electron

Electrons revolving around a nucleus are analogous to a circular current carrying loop. This current produces a magnetic dipole moment proportional to the electron's orbital angular momentum. Since the orbital angular momentum is quantized in terms of the reduced Planck's constant, the dipole moment is quantized in the Bohr Magneton. The value of the Bohr magneton is 9.27 x 10-24 Am2. Electrons also have an intrinsic spin angular momentum, and the associated spin magnetic moment is...
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...

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Updated: Jul 17, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

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光学的に制御されたナノフォトニック・レアアース量子メモリ

Tian Zhong1, Jonathan M Kindem1, John G Bartholomew1

  • 1T. J. Watson Laboratory of Applied Physics, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA.

Science (New York, N.Y.)
|September 2, 2017
PubMed
まとめ

研究者はネオジミウムと光学結晶の穴を使って 高精度ナノフォトニック量子メモリを開発しました この固体デバイスは 効率的な量子ビットの記憶と 制御された読み取りを可能にします これは量子ネットワークの進歩に不可欠です

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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関連する実験動画

Last Updated: Jul 17, 2026

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07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

11.4K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

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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

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科学分野:

  • 量子情報科学
  • ナノフォトニクス
  • 固体物理学

背景:

  • 量子ネットワークには 信頼性の高い量子メモリが必要です
  • コントロールされた読み出しを持つオンチップの量子ビットストレージは,スケーラブルな量子ネットワークノードにとって鍵です.
  • ネオジミウム・アンサンブルが 穴に結合されれば 高性能量子記憶が可能になる

研究 の 目的:

  • 高精度ナノフォトニック量子記憶を 証明するために
  • 量子ビットの効率的な初期化と時間選択の読み取りを実現します.
  • 量子ネットワークのノードに統合可能な固体メモリを開発する.

主な方法:

  • メソスコプのネオジミウム・アンサンブルを光学結晶ナノカビリティに結合する.
  • >95%のスピン極化と効率的な初期化のためにナノキャビティを使用します.
  • 強化された光学スタークシフトを用いて 原子周波数コンブを 選択的に読み出す

主要な成果:

  • 高精度ナノフォトニック量子記憶を証明した
  • メモリ初期化のための効率的なスピン極化 (>95%) を達成した.
  • スターク・シフト・コントロールで タイム・ビン・セレクティブ・リーダウトを有効に

結論:

  • 開発された固体量子記憶は 非常に効率的で制御可能です
  • このメモリは,量子情報処理のための他のチップスケールデバイスと統合できます.
  • この技術はスケーラブルな量子ネットワークノードの開発を進めています