関連する実験動画
Updated: May 25, 2026

11:16
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
Published on: August 7, 2016
量子多体系における相関の光円のような拡散
Marc Cheneau1, Peter Barmettler, Dario Poletti
1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany. marc.cheneau@mpq.mpg
Nature
|January 28, 2012
まとめ
科学者たちは,量子的多体系において,有限な速度で広がる相関を観察し,効果的な光円を示した. この発見は,Lieb-Robinson boundを初めて実験的に確認し,量子力学と計算に影響を及ぼした.
科学分野:
- 凝縮物質物理学 凝縮物質物理学
- 量子情報科学とは,量子情報科学である.
- 量子多体系とは,量子多体系である.
背景:
- 相対論的量子場論における情報伝播は,光の速度によって制限されています.
- 非相対論的システムには理論的な速度制限がないが,物理的な相互作用は有限な伝播速度を示唆している.
- Lieb-Robinson boundは,理論的には,相互作用する多体系における相関拡散の最大速度を確立し,効果的な光円を生成します.
研究 の 目的:
- 相互作用する量子多体系における伝播相関を実験的に検出し観察する.
- 現実の量子システムにおける効果的な光円を境界する相関伝達の存在を検証する.
- 量子力学と量子情報伝達の理解のために,有限な相関速度の意味を探求する.
主な方法:
- 光学格子に一次元量子ガスを利用した.
- システムの消火によってダイナミクスを開始します.
- コレレーションの広がりを観察するために時間解像度検出を使用しました.
主要な成果:
- 量子ガスにおける時間分解の伝播相関を成功裏に検出しました.
- 準粒子ペアが有限速度で相関を運ぶことを実証した.
- システムの量子ダイナミクスを支配する効果的な光円を観測した.
結論:
- 相互作用する量子多体系における伝播相関と効果的な光円の最初の実験的観測を提供した.
- この発見は,物理的な環境におけるリーブ=ロビンソン・バインドのような理論的予測を検証するものである.
- 非均衡量子システムを研究し,量子計算のための効率的な量子チャネルを開発するための新しい道を開く.
関連する概念動画
Energy Associated With a Charge Distribution
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
Atomic Nuclei: Nuclear Spin State Population Distribution
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
First Law: Particles in Two-dimensional Equilibrium
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about the...
Newton's first law tells us about the...
The de Broglie Wavelength
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...
First Law: Particles in One-dimensional Equilibrium
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If we...
2D NMR: Overview of Heteronuclear Correlation Techniques
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other axis.

