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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

61.2K
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 hydrogen spectra.
61.2K
The de Broglie Wavelength02:32

The de Broglie Wavelength

34.3K
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...
34.3K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

2.0K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
2.0K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

1.5K
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.
1.5K
The Bohr Model02:18

The Bohr Model

82.4K
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 the...
82.4K
Electron Orbital Model01:18

Electron Orbital Model

75.8K
Orbitals are the areas outside of the atomic nucleus where electrons are most likely to reside. They are characterized by different energy levels, shapes, and three-dimensional orientations. The location of electrons is described most generally by a shell or principal energy level, then by a subshell within each shell, and finally, by individual orbitals found within the subshells.
The first shell is closest to the nucleus, and it has only one subshell with a single spherical orbital called the...
75.8K

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Updated: Mar 17, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.4K

シュレーディンガー・キャット状態のライドバーグ原子に基づく感受性電気計

Adrien Facon1, Eva-Katharina Dietsche1, Dorian Grosso1

  • 1Laboratoire Kastler Brossel, Collège de France, CNRS, ENS-PSL Research University, UPMC-Sorbonne Universités, 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France.

Nature
|July 15, 2016
PubMed
まとめ
この要約は機械生成です。

研究者はライドバーグの原子を使って 電気場を測定し ハイゼンバーグの限界に近づきました この量子センシング技術は,メソスコピックデバイスの電子を検出する潜在的なアプリケーションのための高い感度を達成します.

さらに関連する動画

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.4K
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
08:53

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures

Published on: October 9, 2012

18.3K

関連する実験動画

Last Updated: Mar 17, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.4K
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.4K
Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
08:53

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures

Published on: October 9, 2012

18.3K

科学分野:

  • 量子測定法
  • 原子物理学
  • 電磁気学

背景:

  • ハイゼンベルクの不確実性原理は 測定精度を根本的に制限します
  • 標準的な量子限界を超えると 通常は非古典的な状態が必要で,それは大きなシステムで準備するのが困難です.
  • 以前の方法は,非古典的な状態計測のための小さな角運動量システムに限定されていました.

研究 の 目的:

  • 標準量子限度を超えた電場測定を 示すために
  • 精度を高めるため,ライドバーグ原子におけるシュレディンガー・キャット状態の計量学的可能性を探求する.

主な方法:

  • 高エネルギーライドバーグ状態の単一の原子を,大きな角運動量 (J ≈ 25) を有する電極計として利用した.
  • シュレーディンガー・キャット状態を通した非古典的進化を設計した.
  • 100ナノ秒の相互作用時間で電場測定を行った.

主要な成果:

  • シングルショットで1.2mV/cmの感度を達成した.
  • 3kHzの繰り返し率で30μV/cm/√Hzの感度を示した.
  • 測定精度の基本的ハイゼンベルグ限界に近づきました.

結論:

  • この研究は,高感度で非侵襲的な電気測定技術の新たな領域を確立しています.
  • Rydberg原子と非古典的状態を用いた開発された方法は,標準的な量子限界を克服するための経路を提供します.
  • 潜在的応用には,高空間および時間解像度のメソスコピック装置における個々の電子の検出が含まれます.