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関連する概念動画

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.6K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.6K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

60.2K
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.
60.2K
Atomic Spectroscopy: Effects of Temperature01:27

Atomic Spectroscopy: Effects of Temperature

1.0K
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
1.0K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.3K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.3K
The de Broglie Wavelength02:32

The de Broglie Wavelength

33.9K
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...
33.9K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

3.2K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
3.2K

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関連する実験動画

Updated: Feb 27, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

15.1K

室温オプトメカニカルカビリティからの量子相関

T P Purdy1, K E Grutter2, K Srinivasan2

  • 1Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. thomas.purdy@nist.gov.

Science (New York, N.Y.)
|June 24, 2017
PubMed
まとめ

量子測定バックアクション,物体の測定によって引き起こされる干渉

さらに関連する動画

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K

関連する実験動画

Last Updated: Feb 27, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

15.1K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

13.3K
Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

9.8K

科学分野:

  • 量子力学について
  • ナノ物理学
  • 光学について

背景:

  • 位置測定は本質的にオブジェクトの動き (量子測定バックアクション) を妨害します.
  • この効果は通常,マクロスコープのオブジェクトの熱運動によってマスクされます.
  • 部屋の温度で量子バックアクションを観察するのは 難しいことです

研究 の 目的:

  • 量子測定バックアクションを室温でナモメカニカルシステムで観測し測定する.
  • 量子バックアクションと熱運動を区別する方法を開発する.
  • 量子校正温度計の可能性を 探るためだ

主な方法:

  • ナノメカニカルビームとレーザーを使って 振動を測定した
  • 量子バックアクションを誘導するために 光学力の変動を導入した
  • 量子効果を分離するために 交差相関の技術を使いました
  • ハイゼンベルグの測定-混乱の不確実性関係を活用した.

主要な成果:

  • 量子測定のサインを 室温まで観察しました
  • 光学的に誘導された運動と熱的運動を区別する方法を実証した.
  • 熱運動の大きさを測定するための量子相関の使用を展示しました.

結論:

  • 量子測定のバックアクションは,室温でも観測し測定することができます.
  • この研究は,量子原理を用いた絶対温度計の新しいアプローチを提供します.
  • この研究はナノスケールでの量子力学と熱力学を結びつけています