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関連する概念動画

The Bohr Model02:18

The Bohr Model

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Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as...
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The de Broglie Wavelength02:32

The de Broglie Wavelength

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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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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Molecular Orbital Theory I02:35

Molecular Orbital Theory I

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Overview of Molecular Orbital Theory
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Electronic Structure of Atoms02:28

Electronic Structure of Atoms

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An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
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Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

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Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
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Gradient Echo Quantum Memory in Warm Atomic Vapor
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非線形光学と量子原子光学

S L Rolston1, W D Phillips

  • 1National Institute of Standards and Technology, Gaithersburg, MD 20899-8424, USA. srolston@nist.gov

Nature
|March 15, 2002
PubMed
まとめ
この要約は機械生成です。

ボーゼ-アインシュタイン凝縮体は非線形および量子原子光学を可能にし,物質波増幅やソリトン行動などの観測につながります. 研究はまた,分割されたコンデンサートの減少した数値変動を含む統計的特性を探求しています.

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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科学分野:

  • 原子物理学と量子光学について
  • ボーゼ・アインシュタイン凝縮物 (Bose-Einstein condensates,BECs) と物質波の探査について

背景:

  • ボーゼ-アインシュタイン濃縮物 (BEC) は,非線形光学や量子光学における光と同様の,一貫した物質波として機能する.
  • 非線形原子光学は,四波混合や相相相一致物質波増幅などの進歩を遂げました.
  • 散らばらないBECモードであるソリトンは実験的に作成され,渦に分裂することが観察されています.

研究 の 目的:

  • 非線形光学と量子原子光学における進歩と重要な現象をレビューする.
  • 光学のアナログとしての原子光学の発展を強調する.
  • 物質波場における統計的性質と相関の研究を導入する.

主な方法:

  • 4波の混合と光-物質の波の混合の観測.
  • BECソリトンの実験的な作成と観察,そしてその分解.
  • 分割されたBECで減少した数の変動の測定.

主要な成果:

  • 相相一貫性物質波増幅の実証.
  • BECソリトンの実験的実現と,その後の渦の崩壊.
  • 還元数変動の測定,量子原子光学のステップ.

結論:

  • ボーゼ-アインシュタイン濃縮物は,非線形光学と量子原子光学の進歩に不可欠である.
  • このフィールドは,ソリトンや波の混合を含む光学に類似した現象を現しています.
  • 物質波の統計的性質に関するさらなる研究は,量子原子光学にとって不可欠である.