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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.
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Molecular Models02:00

Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

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sp3d and sp3d 2 Hybridization
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Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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The Small x Assumption02:20

The Small x Assumption

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If a reaction has a small equilibrium constant, the equilibrium position favors the reactants. In such reactions, a negligible change in concentration may occur if the initial concentrations of reactants are high and the Kc value is small. In such circumstances, the equilibrium concentration is approximately equal to its initial concentration.  This estimation can be used to simplify the equilibrium calculations by assuming that some equilibrium concentrations are equal to the initial...
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Electron Orbital Model01:18

Electron Orbital Model

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Orbitals are the areas outside of the atomic nucleus where electrons are most likely to reside. They are characterized by different energy levels, shapes, and three-dimensional orientations. The location of electrons is described most generally by a shell or principal energy level, then by a subshell within each shell, and finally, by individual orbitals found within the subshells.
The first shell is closest to the nucleus, and it has only one subshell with a single spherical orbital called the...
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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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アナログ量子化学シミュレーション

Javier Argüello-Luengo1,2, Alejandro González-Tudela3,4, Tao Shi1,5

  • 1Max-Planck-Institut für Quantenoptik, Garching, Germany.

Nature
|October 11, 2019
PubMed
まとめ
この要約は機械生成です。

研究者は精密な分子電子構造計算のための新しいアナログ量子シミュレーション方法を開発しました. このアプローチは超冷たい原子と空洞量子力学を組み合わせて,量子化学の問題のデジタル量子計算に効率的な代替案を提供します.

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Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
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科学分野:

  • 量子化学について
  • 量子シミュレーション
  • 原子物理学

背景:

  • 分子電子構造を正確に計算することは 量子化学における大きな課題です
  • 正確な計算は 従来のコンピュータでは不可能で 量子的なアプローチが必要になります
  • デジタル量子シミュレーションは有望ですが アナログ方法はスケーラブルな量子コンピュータを必要とせずに 代替案を提供しています

研究 の 目的:

  • 分子電子構造のための新しいアナログ量子シミュレーションアプローチを提示する.
  • 量子化学のシミュレーションのためのエンジニアリングクーロン相互作用の限界を克服する方法を実証する.
  • 分子の効率的かつ正確な電子構造計算を可能にします.

主な方法:

  • 超冷たい原子を使って 電子を表します
  • 核の引き寄せをシミュレートするために 光学的なポテンシャルを使用します
  • 電子クーロン反発を媒介するモット断熱器の 量子力学と単回転刺激を活用する.

主要な成果:

  • 提案されたシミュレータの動作条件が決定された.
  • アナログのアプローチは単純な分子を使って成功裏にテストされました.
  • 量子化学におけるクーロン相互作用をシミュレートするための実行可能な方法が確立されました.

結論:

  • この研究は,分子電子構造のための効率的なアナログ量子シミュレーション技術を導入します.
  • 超冷たい原子と空洞量子電動学の組み合わせは 量子化学の強力なツールを提供します
  • このアプローチは 精密な電子構造計算の道を開き 量子化学の分野を前進させました