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関連する概念動画

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

49.6K
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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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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Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

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sp3d and sp3d 2 Hybridization
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Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

1.2K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
1.2K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.2K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.2K
Electronic Structure of Atoms02:28

Electronic Structure of Atoms

24.7K

An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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ニュートラル原子量子コンピュータのマルチキビットエンタグリングとアルゴリズム

T M Graham1, Y Song1, J Scott1

  • 1Department of Physics, University of Wisconsin-Madison, Madison, WI, USA.

Nature
|April 21, 2022
PubMed
まとめ
この要約は機械生成です。

ニュートラル原子量子コンピュータは,ライドバーグの相互作用を用いて,鍵となるアルゴリズムを実証します. このスケーラブルな技術は 複雑な問題を解決し 量子センサーを 進歩させることを約束しています

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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科学分野:

  • 量子コンピューティング
  • 原子物理学

背景:

  • ゲートモデルの量子コンピュータには,スケーラビリティと高精度な操作が必要です.
  • ニュートラル・アトム・ハイパー・ファイン・クビットには 固有のスケーラビリティと 長いコヒーレンス・タイムがあります
  • リードバーグ状態は量子計算に不可欠な 強い絡み合う相互作用を提供する.

研究 の 目的:

  • 量子アルゴリズムを プログラム可能な中性原子量子コンピュータで実証する
  • ニュートラル原子配列の可能性を 普遍的な量子計算で示します
  • 量子感知のための非古典的状態の準備を調査する.

主な方法:

  • ゲートモデルの中立原子量子コンピュータを 個別アドレス付きクビットで使った
  • 2次元量子ビットの配列をスキャンした 光学ビームを集中したアーキテクチャを採用した
  • GHZ状態の準備,量子相推定,QAOAを含む実装されたアルゴリズム.

主要な成果:

  • グリーンベルガー-ホーン-ゼイリンガー (GHZ) 状態を6つの量子ビットまで成功裏に準備した.
  • 化学問題の量子相推定を証明した.
  • MaxCutの問題の量子近似最適化アルゴリズム (QAOA) を実行しました.

結論:

  • ニュートラル・アトム・クビット・配列は 普遍的でプログラム可能な量子計算の新興能力を示しています
  • 証明されたアルゴリズムは,複雑な問題解決のためのシステムの可能性を強調しています.
  • この技術は,量子増強型センシングアプリケーションのための非古典的状態の準備に適しています.