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関連する概念動画

Joule-Thomson Effect01:21

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The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
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Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
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Updated: Oct 25, 2025

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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量子化非線形チューレスポンプ

Marius Jürgensen1, Sebabrata Mukherjee2, Mikael C Rechtsman3

  • 1Department of Physics, The Pennsylvania State University, University Park, PA, USA. marius@psu.edu.

Nature
|August 5, 2021
PubMed
まとめ
この要約は機械生成です。

量子的非線形トーレスポンプという 新しいタイプのトポニクスを示しました この方法は,波の輸送を制御するために光-物質の相互作用を使用し,従来のトポロジックシステムを超えた新しいアプローチを提供します.

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関連する実験動画

Last Updated: Oct 25, 2025

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Published on: June 3, 2015

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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科学分野:

  • トポロジック物理学
  • 非線形フォトニクス
  • 量子輸送

背景:

  • 量子ホール効果に触発された波の輸送のトポロジカルな保護は,光子学のような様々なプラットフォームに適用されます.
  • 非線形性と粒子間の相互作用は,電子ケースと比較してシステムの動作を大幅に変更します.
  • 伝統的なThoulessポンプは,量子化輸送のための均等に満たされたバンドに依存しています.

研究 の 目的:

  • 量子化された非線形トーレスポンプを理論的に提案し,実験的に実証する.
  • 不均等に占有された帯域を持つシステムにおけるトポロジカル・トランスポートを調査する.
  • トポロジカル現象の誘導における非線形性の役割を探求する.

主な方法:

  • 量子化された非線形トーレスポンプモデルの理論的提案.
  • 非均等に占有された帯を持つ光子系を用いた実験実証.
  • 量子化のためにソリトン形成と対称性を破る分岐を用いる.

主要な成果:

  • 量子化された非線形トウレスポンプは,非均一な帯域を占有するシステムで達成された.
  • 非線形性がソリトン形成を通じて量子化輸送を誘導することを示した.
  • 伝統的なThoulessポンプとは異なる新しい定量化メカニズムを特定しました.

結論:

  • 非線形と粒子間の相互作用は量子化された輸送とトポロジカルな振る舞いに繋がる.
  • この研究は,光子系におけるトポロジック現象の新たなパラダイムを示している.
  • この発見は,トポロジックフォトニクスにおける新しい応用への道を開きます.