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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

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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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The Uncertainty Principle04:08

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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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The de Broglie Wavelength02:32

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Atomic Nuclei: Nuclear Spin State Overview01:03

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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...
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Directionality of Nuclear Transport01:42

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Ras-related nuclear protein or Ran is a small G protein that cycles between its GTP and GDP bound states. Ran specific regulators, a Ran GTPase Activating Protein or RanGAP present in the cytosol and a Ran guanine nucleotide exchange factor or RanGEF present inside the nucleus regulate GTP/GDP exchange. A high concentration of GTP inside the cells, in addition to this asymmetric distribution of  Ran-specific regulators, leads to a higher RanGTP concentration inside the nucleus. This...
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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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原子量子ビットの決定的量子テレポーテーション

M D Barrett1, J Chiaverini, T Schaetz

  • 1Time and Frequency Division, NIST, Boulder, Colorado 80305, USA.

Nature
|June 18, 2004
PubMed
まとめ

研究者は,イオントラップの原子イオンを使用して,巨大な粒子クビットの無条件の量子テレポーテーションを実証しました. この画期的な進歩は,量子通信と計算を前進させ,78%の精度を達成し,スケーラブルな量子情報処理の道を開く.

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科学分野:

  • 量子情報科学とは,量子情報科学である.
  • 原子物理 原子物理学
  • 量子コンピューティング

背景:

  • 量子テレポーテーションは,キャリアを動かすことなく,効率的な量子情報転送を可能にします.
  • それは絡み合った量子ビット (量子ビット) に依存し,量子通信と計算に不可欠です.
  • 以前の実験では光学システムと核磁気共鳴を用いた.

研究 の 目的:

  • 大量の粒子クビットによる無条件の量子テレポーテーションを実証する.
  • 強化された量子ビット制御のためのセグメンテッドイオントラップに原子イオンを使用する.
  • スケーラブルな量子情報処理の技術を進歩させる.

主な方法:

  • ベリリウムイオン (9Be+) をセグメントイオントラップに閉じ込める.
  • 精密な制御のために個々の量子ビットアドレスを実装します.
  • テレポーテーションプロトコルのためのエンタングルされたクビットを使用します.

主要な成果:

  • 大量の粒子量子ビットの無条件の量子テレポーテーションを達成しました.
  • 78%の平均フィデリティを達成しました.
  • 拡張可能なイオントラップ量子情報処理に不可欠な実証技術.

結論:

  • この実験では,原子イオンを使用して,巨大な粒子クビットを成功裏にテレポートしました.
  • 達成されたフィデリティは,エンタグレメントを使用しないプロトコルを上回ります.
  • この方法論は,イオントラップシステムにおけるスケーラブルな量子情報処理の鍵となる技術を含んでいる.