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関連する概念動画

The Bohr Model02:18

The Bohr Model

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Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as...
62.5K
Induced Electric Dipoles01:28

Induced Electric Dipoles

4.3K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.3K
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

19.6K
Molecular Orbital Energy Diagrams
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Electric Dipoles and Dipole Moment01:30

Electric Dipoles and Dipole Moment

5.4K
Consider two charges of equal magnitude but opposite signs. If they cannot be separated by an external electric field, the system is called a permanent dipole. For example, the water molecule is a dipole, making it a good solvent.
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
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Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

9.8K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
9.8K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

997
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
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関連する実験動画

Updated: Aug 28, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
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Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

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二極刺激子による拡張ボース・ハバードモデル

C Lagoin1, U Bhattacharya2, T Grass2

  • 1Institut des Nanosciences de Paris, CNRS and Sorbonne Université, Paris, France.

Nature
|September 14, 2022
PubMed
まとめ

研究者は2D格子における二極刺激子を使用して拡張ボース・ハミルトニアンを実装した. これは,新しいボース-ハバードモデルシステムにおけるチェッカーボードの順序の観測を可能にしました.

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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関連する実験動画

Last Updated: Aug 28, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
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Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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科学分野:

  • 凝縮物質物理学
  • 量子シミュレーション
  • 人工格子

背景:

  • ハバードモデルは 強く相関する量子システムの理解の鍵です
  • 長期間の相互作用による拡張ボース-ハバードモデルの実験的実現は困難である.
  • 拡張ボーゼ-ハバードモデルは,小数点詰めで新しい順序の相を予測します.

研究 の 目的:

  • 実験的に拡張されたボース・ハミルトニアンを実装する.
  • 新しい量子システムにおける 隔離された相を調査する
  • 量子シミュレーションのための 二極性エクシトンの可能性を探るため

主な方法:

  • 半導体二極エクシトンを 2Dの人工四角格子に閉じ込める
  • 強い二極反発を用いて近隣の相互作用をします
  • プログラム可能な幾何学と100以上のサイトを実装します.

主要な成果:

  • 半充満状態の絶縁状態の安定化
  • チェッカーボードの空間順に一致するシグネチャーの観察
  • オフサイトで相互作用するボゾンのような配列の制御された実装の実証.

結論:

  • 二極性エクシトンは,拡張ボース-ハバード物理学の実現のためのプラットフォームを提供します.
  • この研究は,調節可能な相互作用を持つ複雑な量子相をシミュレートするための道を開きます.
  • このシステムはプログラム可能な格子幾何学と大規模量子シミュレーションを可能にします