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関連する概念動画

Cluster Sampling Method01:20

Cluster Sampling Method

13.9K
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
13.9K
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

1.1K
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
1.1K
First Law: Particles in Two-dimensional Equilibrium01:18

First Law: Particles in Two-dimensional Equilibrium

13.9K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
13.9K
State Space Representation01:27

State Space Representation

492
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...
492
Random Variables01:09

Random Variables

17.1K
A random variable is a single numerical value that indicates the outcome of a procedure. The concept of random variables is fundamental to the probability theory and was introduced by a Russian mathematician, Pafnuty Chebyshev, in the mid-nineteenth century.
Uppercase letters such as X or Y denote a random variable. Lowercase letters like x or y denote the value of a random variable. If X is a random variable, then X is written in words, and x is given as a number.
For example, let X = the...
17.1K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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関連する実験動画

Updated: Jan 5, 2026

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations
05:22

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations

Published on: March 21, 2019

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二次元クラスター状態の決定的生成

Mikkel V Larsen1, Xueshi Guo2, Casper R Breum2

  • 1Center for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kgs. Lyngby, Denmark. mivila@fysik.dtu.dk ulrik.andersen@fysik.dtu.dk.

Science (New York, N.Y.)
|October 19, 2019
PubMed
まとめ
この要約は機械生成です。

測定ベースの量子計算に不可欠な 大きな光子クラスター状態を 作り出すためのスケーラブルな方法を示します この画期的な発見により 量子情報処理の普遍性と 容認性のある量子コンピュータが実現しました

さらに関連する動画

Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

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Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

Published on: April 8, 2020

8.6K

関連する実験動画

Last Updated: Jan 5, 2026

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations
05:22

Initial 3D Cell Cluster Control in a Hybrid Gel Cube Device for Repeatable Pattern Formations

Published on: March 21, 2019

6.1K
Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

11.7K
Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
12:11

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry

Published on: April 8, 2020

8.6K

科学分野:

  • 量子情報科学
  • 量子光学
  • 凝縮物質物理学

背景:

  • 測定ベースの量子計算 (MBQC) は,指数関数的な加速のために絡み合ったクラスター状態を使用します.
  • 大規模でトポロジ的に構造化されたクラスター状態を生成することは,普遍的なMBQCにとって極めて重要です.

研究 の 目的:

  • 2D光子クラスター状態を生成するためのスケーラブルなスキームを提案し,実証する.
  • 普遍的な測定ベースの量子計算に適したクラスター状態を作成します.

主な方法:

  • 圧縮された光モードのタイムマルチプレキシング
  • 遅延ループとビーム・スプリッターの変換を利用する.
  • 2D トポロジカル構造を持つ円筒状クラスター状態の決定的生成.

主要な成果:

  • 円筒状のクラスター状態の生成で 30,000 以上の絡み合っているモードがあります.
  • この州は2Dトポロジック構造で,周長24モード,長さ1250モードがあります.
  • 証明されたソースは,普遍的な量子情報処理に適しています.

結論:

  • 開発されたスキームは,大規模な光子クラスター状態へのスケーラブルな経路を提供します.
  • この技術と量子エラー修正は 容認性量子計算を可能にします
  • この2Dクラスター状態は 量子コンピューティングの実現に向けた 重要な一歩です