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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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Superconductor01:24

Superconductor

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Parallel Processing01:20

Parallel Processing

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The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
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Types Of Superconductors01:28

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Superposition Theorem01:18

Superposition Theorem

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The superposition principle is a fundamental concept stating that in a linear circuit, the voltage across (or current through) an element can be determined by summing the individual contributions of each independent source acting in isolation. When dealing with linear circuits containing multiple independent sources, this principle serves as a valuable tool for analysis. To apply the superposition principle effectively, one should focus on a single independent source at a time while...
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Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

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A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
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超伝導量子プロセッサによる2量子ビットアルゴリズムの実証.

L DiCarlo1, J M Chow, J M Gambetta

  • 1Department of Physics, Yale University, New Haven, Connecticut 06511, USA.

Nature
|June 30, 2009
PubMed
まとめ

研究者は2量子ビット超伝導量子プロセッサを開発し,主要な量子アルゴリズムを実証しました. この固体状態の進歩は,スケーラブルな量子コンピューティングと集積回路にとって極めて重要です.

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科学分野:

  • 量子コンピューティング
  • 固体物理学 固体物理学とは
  • 超伝導回路は,超伝導回路である.

背景:

  • 量子コンピュータは,複雑な問題解決のためのスーパーポジションとエンタグリングを活用します.
  • 拡張可能な量子プロセッサの構築は,量子ビットの一貫性,ゲート操作,および読み出しに関する課題に直面しています.
  • 以前の数量子ビットのプロセッサは,NMR,イオントラップ,光学システムを使用していたが,固体状態の実現は難しかった.

研究 の 目的:

  • 機能する2量子ビット超伝導量子プロセッサを実証するために.
  • 固体プラットフォームでグロバー検索とDeutsch-Jozsa量子アルゴリズムを実装する.
  • 統合量子回路の開発を進めること.

主な方法:

  • 量子量子力学アーキテクチャの回路を利用し,可調の2量子ビット相互作用をキャビティバスで媒介した.
  • 制御された量子ビット相互作用の強さは,ナノ秒の時間スケールで2桁の大きさです.
  • プログラム可能なゲートの配列を量子ビットの初期化されたレジスタに適用した.

主要な成果:

  • 2量子ビット超伝導量子プロセッサの実証に成功しました.
  • グロバーの検索とDeutsch-Jozsaの量子アルゴリズムを実装しました.
  • 94%の競争力を持つ高度に絡み合った州を生み出しました.

結論:

  • この2量子ビットの超伝導プロセッサは,集積回路におけるスケーラブルな量子コンピューティングに向けた重要な一歩を表しています.
  • 量子ビットのコヒーレンス時間,ゲートの忠実度,およびレジスタの大きさのさらなる改善は,実用的な量子技術のために必要である.
  • 調節可能な相互作用メカニズムは,高いレベルの絡み合いを生成するための鍵です.