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関連する概念動画

Quantum Numbers02:43

Quantum Numbers

39.9K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
39.9K
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

51.8K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
51.8K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

1.9K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
1.9K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

1.7K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
1.7K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.2K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.2K
The Hall Effect01:30

The Hall Effect

5.2K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
5.2K

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関連する実験動画

Updated: May 6, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 2, 2013

16.0K

量子ガスのスピンホール効果

M C Beeler1, R A Williams, K Jiménez-García

  • 1Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland 20899, USA.

Nature
|June 7, 2013
PubMed
まとめ

研究者は,スピン・ホール効果を量子ボゼガスで観察し,スピン・トランジスタを作成しました. このブレークスルーは,粒子の流れを制御するためにスピンに依存する力を使用し,新しいセンサーとトポロジカル量子装置の道を開く.

科学分野:

  • 量子物理学とは,量子物理学のことです.
  • 凝縮物質物理学 凝縮物質物理学
  • 原子物理学 原子物理学とは

背景:

  • スピンホール効果は,流動する粒子に対するスピン依存力を含み,ホール効果に類似するが,異なるスピン状態の対極の記号がある.
  • 以前のスピン・ホール効果の観測は,特定の材料の電子と,介電結合のレーザー光に限られていた.

研究 の 目的:

  • 量子変性ボースガスのスピンホール効果を観察する.
  • スピンホール効果を利用して冷原子スピントランジスタを作成する.
  • 量子ガスのスピン依存ロレンツ力を設計・測定する.

主な方法:

  • 量子退廃したボースガスを生み出す.
  • 空間的に不均一なスピン・軌道結合場を設計する.
  • 量子ガス内のスピン依存のローレンツ力を測定する.

主要な成果:

  • 量子変性ボゼガスにおけるスピン・ホール効果の成功観察.
  • 機能する"アトモトロニック"スピントランジスタの実証.
  • スピン依存のローレンツ力に関する実験結果は,理論的な計算と非常に一致しています.

さらに関連する動画

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

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関連する実験動画

Last Updated: May 6, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 2, 2013

16.0K
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
10:36

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

8.3K

結論:

  • ボーゼのガスにおける観測されたスピン・ホール効果は,速度無感のアディアバティック・スピン・セレクターの作成を可能にします.
  • この研究は,トポロジカル断熱器の設計と,量子ガスにおける量子化スピンホール効果の検出のための基礎を提供します.
  • 開発されたシステムは,半導体スピントロニックデバイスのレーザー駆動アナログとして機能します.