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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

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
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

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The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
51.7K
Valence Bond Theory02:42

Valence Bond Theory

8.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.9K
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

5.1K
All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute...
5.1K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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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 one, the...
1.9K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.2K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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関連する実験動画

Updated: May 4, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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シリコンの単原子電子スピン量子ビット.

Jarryd J Pla1, Kuan Y Tan, Juan P Dehollain

  • 1Centre for Quantum Computation and Communication Technology, School of Electrical Engineering & Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia. jarryd@unsw.edu.au

Nature
|September 21, 2012
PubMed
まとめ
この要約は機械生成です。

研究者らは,シリコンの個々の電子スピン量子ビットの一貫した操作を実証した. 量子コンピューティングにおけるこの画期的な進歩は,単一のリン原子を用いて,スケーラブルな量子プロセッサへの道を切り開いている.

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

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関連する実験動画

Last Updated: May 4, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

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Published on: January 19, 2018

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科学分野:

  • 量子コンピューティング
  • 原子物理 原子物理学
  • 固体物理 固体物理学

背景:

  • 単一の原子は,量子ビット (qubits) のための理想的な量子システムです.
  • 以前の量子ビット実装には,電磁気トラップとダイヤモンドの窒素空白センターが含まれています.
  • 量子プロセッサのスケーリングには,原子量子ビットと電気デバイスを統合する必要があります.

研究 の 目的:

  • シリコンのリン原子に結合した個々の電子スピン量子ビットの一貫した操作を実証する.
  • キュービット状態の電気的な読み取りを達成するために.
  • 拡張可能な量子コンピューティングアーキテクチャの可能性を評価する.

主な方法:

  • ラビ振動を駆動するために電子スピン共振 (ESR) を利用しました.
  • ハーンエコーパルス配列を用いて,スピンコヒーレンス時間を測定した.
  • 電気読み取りのための統合回路技術と互換性のあるデバイスアーキテクチャを開発しました.

主要な成果:

  • 自然シリコンにおける単一の電子スピン量子ビットの一貫した操作が実証された.
  • 量子ビットの単発の電気読み取りを達成しました.
  • 200マイクロ秒を超えるスピンコヒーレンス時間を測定し,濃縮シリコンではより長い時間を確保する可能性があります.

結論:

  • シリコンの単一のリン原子の電子スピンは,スケーラブルな量子コンピューティングのための有望なプラットフォームです.
  • 電気的測定と一貫した制御を成功裏に組み合わせました.
  • このアプローチは,既存の集積回路技術との互換性を提供します.