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関連する概念動画

Quantum Numbers02:43

Quantum Numbers

50.0K
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.
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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 hydrogen spectra.
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Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

3.1K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
3.1K
Forced Oscillations01:06

Forced Oscillations

8.0K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
8.0K
Damped Oscillations01:07

Damped Oscillations

7.2K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
7.2K
Oscillations about an Equilibrium Position01:04

Oscillations about an Equilibrium Position

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Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so...
6.9K

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Updated: Jan 31, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

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量子Jオシレーター

Jingyan Xu1,2,3, Raphael Kircher1,2,3, Oleg Tretiak1,2,3

  • 1Helmholtz Institute Mainz, Mainz, Germany.

Nature communications
|January 29, 2026
PubMed
まとめ
この要約は機械生成です。

量子Jオシレーターは、磁場フリー、高分解能分光法のために分子Jカップリングを活用する。この画期的な技術により、正確な測定と分子識別が可能になり、量子ダイナミクス探求のための新しいプラットフォームが提供される。

キーワード:
量子Jオシレーター磁場フリーNMR高分解能分光法Jカップリング量子ダイナミクス

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関連する実験動画

Last Updated: Jan 31, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Published on: May 30, 2014

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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科学分野:

  • 量子物理学; 分光法; 分子ダイナミクス

背景:

  • ゼロ磁場核磁気共鳴（NMR）は、分子特性評価に不可欠なスカラーJカップリングへの磁場フリーアクセスを提供します。; 従来のゼロ磁場NMRは、過渡信号によるスペクトル分解能と周波数安定性の限界に直面しています。

研究 の 目的:

  • 分子Jカップリングを利用した位相コヒーレント発振を生成するための量子Jオシレーターを導入すること。; 磁場フリー分光法における超高分解能と周波数安定性を達成すること。; コンパクトな卓上プラットフォームで非線形スピンダイナミクスと量子カオスを探求すること。

主な方法:

  • 分子内のJカップリングを利用する量子Jオシレーターの開発。; デジタルフィードバック制御によるゼロ磁場での動作。; [15N]-アセトニトリルを用いた原理実証実験。

主要な成果:

  • 磁場ゼロで位相コヒーレント連続発振を実現しました。; [15N]-アセトニトリルで3600秒にわたる340μHzの線幅を実証しました。これは、従来のゼロ磁場NMRよりも2桁以上狭いです。; 精密分光法および量子ダイナミクスのためのコンパクトで磁場フリーのプラットフォームを確立しました。

結論:

  • 量子Jオシレーターは、高分解能、磁場フリー分光法において重要な進歩をもたらします。; この技術は、正確なJカップリング測定と分子識別を容易にします。; このプラットフォームは、超高精度周波数基準と分子指紋を必要とするアプリケーションに新たな道を開きます。