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関連する概念動画

Semiconductors01:22

Semiconductors

677
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
677
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

917
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
917
Types of Semiconductors01:20

Types of Semiconductors

583
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
583
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K
Quantum Numbers02:43

Quantum Numbers

34.6K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
34.6K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

42.1K
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 hydrogen spectra.
42.1K

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関連する実験動画

Updated: Jun 19, 2025

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.6K

半導体量子プロセッサー

Chien-An Wang1, Valentin John1, Hanifa Tidjani1

  • 1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, Netherlands.

Science (New York, N.Y.)
|July 25, 2024
PubMed
まとめ
この要約は機械生成です。

量子ドットでのスピンホッピングを用いて 新しい量子制御方法を開発しました このアプローチは 離散信号で効率的な量子ビット制御を可能にし,スケーラブルな量子ハードウェアとエラー修正の道を開きます.

さらに関連する動画

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.6K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

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関連する実験動画

Last Updated: Jun 19, 2025

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.6K
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.6K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

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科学分野:

  • 量子コンピューティング
  • 固体物理学

背景:

  • 効率的な量子ビット制御は 拡張可能な量子ハードウェアに不可欠です
  • 現在の共鳴制御方法は,信号統合,クロストーク,加熱によりスケーラビリティの課題に直面しています.

研究 の 目的:

  • 量子ドット間のスピン・ホッピングを用いた 新しい量子制御方法を実証する
  • 高精度量子ゲートを実現し,量子エラーの修正の可能性を探求する.

主な方法:

  • 場所に依存するスピン定量化軸を持つ量子ドット間でのスピンジャンプ.
  • ジャンプベースの量子論理演算を証明した.
  • 10量子ドットシステムの統計的にマッピングされたコヒーレンスが,チューニング方法としてホッピングスピンを確立します.

主要な成果:

  • シングル・クビット・ゲート・フィデリティ 99.97%
  • ホップごとに99.992%の一貫したシャトルフィデリティが得られた.
  • 2量子ビットゲートの精度は99.3%で 予測された量子エラー修正の値を達成しました

結論:

  • ホッピングベースの量子制御は,共鳴制御のスケーラブルな代替手段を提供します.
  • 密度の高い量子ドット配列は 接続性の高い量子ビットレジスタに適しています
  • この方法は効率的な量子情報処理とハードウェア開発を容易にする.