マクロスコープの機械振動器の量子集合運動
Mahdi Chegnizadeh1,2,3, Marco Scigliuzzo1,2,3, Amir Youssefi1,2,3
1Institute of Physics, Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland.
Science (New York, N.Y.)
|December 19, 2024
まとめ
研究者は6つの機械的振動器で 量子集合運動を達成し 前の限界を克服しました 超伝導電路の光学学におけるこの突破は 新しい量子絡みや計測学の研究を可能にします
科学分野:
- 量子物理学
- オプトメカニクス
- 凝縮物質物理学
背景:
- 複雑なシステムの集合的現象は 独特の行動を示します
- 機械的な振動器における量子集合現象に関する以前の研究は,同一の構成要素の必要性によって制限されていました.
研究 の 目的:
- 6つの機械的振動器のシステムにおける 集合運動の量子体制を証明する.
- オプトメカニカル・プラットフォームで 個人の動きから 集団の動きへの移行を 探求すること
主な方法:
- N=6の機械的振動器 (ヘクサマー) を搭載した超伝導回路の光学プラットフォームを使用した.
- 個人の動きから集団的な動きへの移行を誘導します.
- サイダーバンド冷却を使って 集団モードを量子基本状態に 準備する.
主要な成果:
- 超放射性と同様の空洞-集合モードの結合の強化を観察した.
- ゼロポイントの動きが複数の振動器に分布している集団運動が確認された.
- 量子サイドバンド非対称性測定による集団モードの量子基底状態を特徴づけた.
結論:
- この研究は,機械的な振動器のヘクサマーで集合運動の量子体制を成功裏に実証した.
- この研究は,マクロスケールの量子システムにおける多部分の絡み合いを調査するための道を開きます.
- この発見は量子計測学の応用における 進歩の可能性を秘めています
関連する概念動画
01:06Forced Oscillations
6.5K
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.
6.5K
01:04Oscillations about an Equilibrium Position
5.3K
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...
5.3K
01:07Damped Oscillations
5.6K
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...
Although friction and other non-conservative...
5.6K
01:21Simple Harmonic Motion
9.3K
Simple harmonic motion is the name given to oscillatory motion for a system where the net force can be described by Hooke's law. If the net force can be described by Hooke's law and there is no damping (by friction or other non-conservative forces), then a simple harmonic oscillator will oscillate with equal displacement on either side of the equilibrium position. To derive an equation for period and frequency, the equation of motion is used. The period of a simple harmonic oscillator...
9.3K
02:45The Quantum-Mechanical Model of an Atom
41.9K
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.
41.9K
02:32The de Broglie Wavelength
25.3K
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...
25.3K