関連する実験動画
Updated: Feb 26, 2026

10:00
Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
13.3K
負質基準枠における量子反作用回避運動の測定
Christoffer B Møller1, Rodrigo A Thomas1, Georgios Vasilakis1,2
1Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark.
Nature
|July 14, 2017
まとめ
研究者は原子スピン振動器を使用して,機械振動器の量子反作用 (QBA) を回避しました. この突破により 運動と力を感知する精度が向上し 標準的な量子限界を超えた 量子通信が可能になります
科学分野:
- 量子力学について
- 量子光学
- オプトメカニクス
背景:
- 連続した位置測定は量子反作用 (QBA) を引き起こし,ハイゼンベルク不確実性原理による運動感知精度を制限する.
- 標準量子限界は位置,速度,加速測定の精度を制限する.
研究 の 目的:
- QBAの回避を顕微鏡のメカニカルオシレータで実証する.
- 機械とスピンの振動器を組み合わせた ハイブリッド量子システムの探査
主な方法:
- 介電膜メカニカルオシレータと原子アンサンブルスピンオシレータを搭載したハイブリッドシステムを使用した.
- 光を用いたハイブリッドシステムでの集合量子測定を行った.
- 負の効果質量と正の効果質量でスピン振動器を設定した.
主要な成果:
- 負の質量設定で -1.8デシベルのQBA抑制を達成しました.
- プラスの質量設定では2. 4デシベルのQBA増幅が観察されました.
- 標準的な量子制限の 回避を証明した
結論:
- ハイブリッド量子システムにおける QBA の回避は 標準的な量子限界を超えた 精密感知のための新しい道を開きます
- 遠隔の機械系とスピン系との間の 絡み合いの生成と量子通信を容易にする.
- 開発されたシステムは,力,運動,重力感知における高度なアプリケーションの可能性を秘めています.
関連する概念動画
The Uncertainty Principle
33.6K
Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
33.6K
Non-inertial Frames of Reference
7.8K
A reference frame accelerating or decelerating relative to an inertial frame is a non-inertial frame. To help understand this, consider what taking off in an airplane, turning a corner in a car, riding a merry-go-round, and the circular motion of a tropical cyclone all have in common. All these systems are accelerating, decelerating, or rotating relative to the Earth; hence, they all are non-inertial frames. All these systems exhibit inertial forces, which merely seem to arise from motion,...
7.8K
Inertial Frames of Reference
9.3K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
9.3K
Relative Velocity in One Dimension
11.1K
The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...
11.1K
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
Space-Time Curvature and the General Theory of Relativity
4.7K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
4.7K

