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関連する概念動画

Network Function of a Circuit01:25

Network Function of a Circuit

468
Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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Multimachine Stability01:25

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Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
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In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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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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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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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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量子ネットワークにおける決定的マルチキビットエンタグリング

Youpeng Zhong1,2, Hung-Shen Chang1, Audrey Bienfait1,3

  • 1Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA.

Nature
|February 25, 2021
PubMed
まとめ
この要約は機械生成です。

超伝導量子プロセッサを繋ぐ 量子ネットワークを開発しました この画期的な発見は 決定的マルチキビット 絡み合いの分布を可能にします これはスケーラブルな量子コンピューティングと 通信ネットワークに不可欠です

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Last Updated: Nov 16, 2025

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科学分野:

  • 量子情報科学
  • 量子コンピューティング
  • 量子通信ネットワーク

背景:

  • 高精度分散型マルチキビット・エンタグリングは 量子ネットワークにとって不可欠です
  • 以前は2つの量子ビットに 限定されていました
  • ステート・トランスファー・フィデリティの難しさは,マルチ・キュービット・エンタグレメント・ディストリビューションを妨げました.

研究 の 目的:

  • 超伝導量子ノード間の量子状態の決定的移転を証明する.
  • グリーンベルガー-ホーン-ゼイリンガー (GHZ) 状態を準備し,転送する.
  • 大規模な量子コンピューティングのためのモジュールアーキテクチャを確立する.

主な方法:

  • 2つの超伝導ノードをコアキシアルケーブルで 接続した量子ネットワークを作りました
  • 各ノードは3つの相互接続された超伝導量子ビットを含んでいます
  • 接続ケーブルを介してクイビット対クイビット状態の直接転送を実行します.

主要な成果:

  • ノード間の状態転送プロセスのフィデリティは0.911 ±0.008を達成した.
  • 0.656 ± 0.014の信頼性で 3 キビットGHZ状態を成功裏に転送しました.
  • 0.722 ± 0.021の忠誠度で6キビット,2ノードGHZ状態を生成し,多部分の絡み合いの値を超えました.

結論:

  • 開発された量子ネットワークアーキテクチャは,超伝導量子プロセッサの一貫したリンクを可能にします.
  • 物理的なリンク上の決定的マルチキビットエンタグレメント分布を証明した.
  • 大規模な量子コンピュータを構築するための実行可能なモジュラーアプローチを提供します.