関連する実験動画
Updated: May 4, 2026

17:14
Compact Quantum Dots for Single-molecule Imaging
Published on: October 9, 2012
17.5K
室温の単一の量子ドットからの光子間の量子相関.
1Department of Electrical and Computer Engineering, University of California, Santa Barbara 93106, USA.
Nature
|September 13, 2000
まとめ
研究者は,単一の量子ドットからフォトンアンチバンチングを観察し,非古典的な光の固体状態の源であることを実証しました. この人工的なシステムは,量子点のクラスターとは異なり,単一の原子のように振る舞います.
科学分野:
- 量子光学とは,量子光学である.
- 固体物理学 固体物理学とは
- マテリアルサイエンス 材料科学
背景:
- 古典的な電磁力学 (マックスウェルの方程式) は,統計的光を記述するが,単一の発射器からの相関は記述しない.
- 単一の量子エミッター光の相関を理解するために,放射線場の定量化が必要である.
- 原子共振光における光子反乱は,非古典的な放射線を確証する.
研究 の 目的:
- 単一の量子ドットから室温で光子アンチバッシングを実験的に観察する.
- 量子ドットを人工原子と非古典的な光の固体源として確立する.
- 単一の量子ドットとクラスターからの光子放出統計を調査する.
主な方法:
- フォトン放射の実験的観測.
- フォトン相関の測定 (アンチバンシング).
- 単一のカドミウムセレニド量子ドットを使用して,室温で.
主要な成果:
- 単一のカドミウムセレニド量子ドットからフォトンアンチバンチングが観察されました.
- 単一の量子ドットは,離散的なアンハーモニックスペクトルを示し,人工原子のように振る舞う.
- 量子点のクラスターからの光子放出は,相関関係のない出来事を示した.
結論:
- 単一の量子ドットは,非古典的な光の固体状態の源として機能します.
- 量子ドットは,光子放射の観点から,単一の原子の行動を模倣する.
- 単一の量子ドットのアンハーモニックスペクトルは,非古典的な光発電に不可欠です.
関連する概念動画
The de Broglie Wavelength
25.7K
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...
25.7K
The Quantum-Mechanical Model of an Atom
47.1K
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...
47.1K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
1.3K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
1.3K
¹³C NMR: ¹H–¹³C Decoupling
1.7K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.7K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
3.3K
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...
According to Hooke's law, the vibrational frequency is directly proportional to...
3.3K
Atomic Spectroscopy: Effects of Temperature
1.2K
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...
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...
1.2K

