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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...
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Free Energy Changes for Nonstandard States03:25

Free Energy Changes for Nonstandard States

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The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
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First Law: Particles in One-dimensional Equilibrium01:10

First Law: Particles in One-dimensional Equilibrium

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Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
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Propagation of Uncertainty from Random Error00:59

Propagation of Uncertainty from Random Error

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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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Propagation of Uncertainty from Systematic Error01:10

Propagation of Uncertainty from Systematic Error

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The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
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State Space Representation01:27

State Space Representation

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The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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固体状態のシステムでフィード・フォワードによる決定的量子テレポーテーション.

L Steffen1, Y Salathe, M Oppliger

  • 1Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland. lsteffen@phys.ethz.ch

Nature
|August 20, 2013
PubMed
まとめ
この要約は機械生成です。

研究者らは,超伝導回路を用いた決定的量子テレポーテーションを実証した. この量子情報科学の突破は,マクロスコーピック量子システム間の高精度状態転送を可能にし,量子通信ネットワークの道を開く.

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関連する実験動画

Last Updated: Apr 28, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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Published on: May 30, 2014

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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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.
  • 超伝導回路について
  • 量子コンピューティング

背景:

  • 超伝導回路を用いたマクロスコーピック量子システムは,量子情報科学の鍵となる.
  • 現在のシステムは,基本的な論理ゲート,絡み合った状態,およびエラー修正を可能にします.
  • 高精度単量子ビットの読み取りは,フィードバック制御に不可欠です.

研究 の 目的:

  • チップベースの超伝導回路でフィードフォワードによる完全な決定的量子テレポーテーションを実現する.
  • 精密な制御のために,高度な読み取り技術と柔軟なデジタルエレクトロニクスを利用します.
  • 複雑な回路アーキテクチャのためのクロス量子バス技術の可能性を調査する.

主な方法:

  • 2つのパラメトリック増幅器のセットを使用し,結合および個々の量子ビットの単発読み出しを使用しました.
  • 制御のための統合された柔軟なリアルタイムデジタル電子機器.
  • 任意の接続性を持つ平面回路アーキテクチャのクロス量子バス技術を活用しました.

主要な成果:

  • 超伝導回路のフィードフォワードで完全な決定的量子テレポーテーションを達成しました.
  • 量子状態の高精度テレポーテーションが,マクロシステム (距離6mm) 間で10^4s^-1.0の速度で実証された.
  • このプロセスは,任意の入力状態のほぼ単位の確率で成功しました.

結論:

  • 実証された量子テレポーテーションスキームは,非常に効率的でスケーラブルです.
  • 超伝導波導体は低伝送損失を提供し,より長い距離の量子通信を可能にします.
  • フィード・フォワード・テクニックは,量子エラー補正アプリケーションの有望性を示しています.