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関連する概念動画

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.
For the first part of the...
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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...
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Distribution of Molecular Speeds01:27

Distribution of Molecular Speeds

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The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This predictable distribution of molecular speeds is known as the Maxwell-Boltzmann distribution. The distribution of molecular speeds in liquids is comparable to that of gases but not identical and can help to understand the phenomenon of the boiling and vapor pressure of a liquid. Consider that a molecule requires a...
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Speed of a Transverse Wave01:13

Speed of a Transverse Wave

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The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
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The Uncertainty Principle04:08

The Uncertainty Principle

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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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Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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量子コンピューティング. 量子加速の定義と検出

Troels F Rønnow1, Zhihui Wang2, Joshua Job3

  • 1Theoretische Physik, ETH (Eidgenössische Technische Hochschule) Zurich, 8093 Zurich, Switzerland.

Science (New York, N.Y.)
|July 26, 2014
PubMed
まとめ

研究者は,小さな量子装置で量子加速を測定する方法を探求した. 503クビットを使ったD-Wave Two装置をテストしたところ,ランダムなスピングラス問題に対する明確な量子加速は見つかりませんでした.

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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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関連する実験動画

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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科学分野:

  • 量子コンピューティング
  • 計算的複雑性理論とは

背景:

  • 量子加速の評価は,量子ハードウェアの評価に不可欠です.
  • 小規模な量子デバイスは,性能測定にユニークな課題を提示します.

研究 の 目的:

  • 量子加速を厳格に定義し,測定する.
  • スピードアップ評価における一般的な落とし穴を特定し,回避する.
  • これらの方法をD-Wave Two量子アニラーで実証的にテストする.

主な方法:

  • 量子加速の定義と測定のための枠組みの開発.
  • ランダムなスピングラスのインスタンスを基準問題として利用する.
  • 最大503クビットを持つD-Wave Twoデバイスでテストしています.

主要な成果:

  • データセット全体を分析したところ,量子加速の証拠は見つかりませんでした.
  • 個別のインスタンスサブセットを比較すると,不確実な結果が得られました.
  • この研究は,量子加速の検出の微妙な性質を強調しています.

結論:

  • 現在の方法とベンチマークは,すべての問題タイプについて量子加速を明らかにしない可能性があります.
  • データ分析の注意深い検討は,結果を誤って解釈することを避けるために不可欠です.
  • 量子加速を様々な問題クラスで探求するためにさらなる研究が必要である.