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関連する概念動画

Quantum Numbers02:43

Quantum Numbers

51.7K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
51.7K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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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.
59.0K
Atomic Radii and Effective Nuclear Charge03:08

Atomic Radii and Effective Nuclear Charge

62.2K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
62.2K
Nuclear Stability03:18

Nuclear Stability

23.3K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
23.3K
Nuclear Fusion02:45

Nuclear Fusion

33.9K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
33.9K
Non-nuclear Inheritance01:29

Non-nuclear Inheritance

23.3K
Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
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関連する実験動画

Updated: Feb 8, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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ニューラルネットワーク量子状態による核応答

Elad Parnes1, Nir Barnea1, Giuseppe Carleo2

  • 1The Hebrew University, Racah Institute of Physics, Jerusalem 91904, Israel.

Physical review letters
|February 6, 2026
PubMed
まとめ

自己束縛量子系の研究のために、ニューラルネットワークと量子力学を組み合わせた新しい計算フレームワークを開発しました。この手法は核光吸収断面積を正確に予測し、実験データとの信頼性の高い比較を提供します。

キーワード:
ニューラルネットワーク量子状態核光吸収断面積量子多体物理学変分モンテカルロ法ローレンツ積分変換法

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Deep Neural Networks for Image-Based Dietary Assessment

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科学分野:

  • 量子多体系物理学
  • 計算物理学
  • 核物理学

背景:

  • 量子系の動的特性の研究は計算上困難である。
  • 正確な理論的予測には、堅牢な手法と不確実性の定量化が必要である。
  • 軽い原子核の光吸収断面積は、核構造の研究にとって重要である。

研究 の 目的:

  • 量子多体系のための新しい変分モンテカルロフレームワークを導入すること。
  • 自己束縛系の動的特性、特に光吸収断面積を計算すること。
  • 軽い原子核を用いてフレームワークを検証し、既存のベンチマークと比較すること。

主な方法:

  • ニューラルネットワーク量子状態とローレンツ積分変換技術の組み合わせ。
  • 連続ヒルベルト空間における変分モンテカルロアプローチの利用。
  • 核ハミルトニアンのための先導次数のパイオニレス実効場理論（EFT）展開の採用。

主要な成果:

  • 軽い原子核の光吸収断面積に対する正確な理論的予測。
  • 理論結果に対する堅牢な不確実性の定量化。
  • 単純な核ハミルトニアンが信頼性の高い光吸収予測を提供することの実証。

結論:

  • 開発されたフレームワークは、様々な量子系に広く適用可能である。
  • この手法は、核光吸収に対して正確かつ信頼性の高い予測を提供する。
  • この研究は、動的特性に対する特定の核ハミルトニアンの使用を検証する。