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関連する概念動画

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

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...
First-Order Circuits01:15

First-Order Circuits

First-order electrical circuits, which comprise resistors and a single energy storage element - either a capacitor or an inductor, are fundamental to many electronic systems. These circuits are governed by a first-order differential equation that describes the relationship between input and output signals.
One common example of a first-order circuit is the RC (resistor-capacitor) circuit. These circuits are used in relaxation oscillators such as neon lamp oscillator circuits. When voltage is...
Van de Graaff Generator01:15

Van de Graaff Generator

Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...

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関連する実験動画

Updated: Jul 11, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

電子回路で単一のマイクロ波フォトンを生成する.

A A Houck1, D I Schuster, J M Gambetta

  • 1Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.

Nature
|September 21, 2007
PubMed
まとめ

研究者らは,量子通信のためのオンチップ,オンデマンドの単光子源を開発した. この量子光学の突破は,マイクロ波フォトンをワイヤに効率的に注入し,チップ間の量子情報転送を可能にします.

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Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
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Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

関連する実験動画

Last Updated: Jul 11, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
11:30

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

科学分野:

  • 量子光学とは,量子光学である.
  • 固体物理学 固体物理学とは
  • 量子情報科学とは,量子情報科学である.

背景:

  • クラシック通信にはマイクロ波が不可欠ですが,量子通信には単一の光子が必要です.
  • 従来の単光子光源は,量子回路に簡単に統合できません.
  • 量子コンピューティングと通信には,効率的なオンチップ単光子源が必要です.

研究 の 目的:

  • 量子通信のためのオンチップ,オンデマンドの単光子源を実証する.
  • 集積回路にマイクロ波フォトンの効率的な注入を可能にするために.
  • フライングクビットを使用してチップの間の量子情報転送を容易にするために.

主な方法:

  • サーキット量子電動学のアーキテクチャを利用した.
  • 単一の超伝導量子ビットから自発的な放射を高めるために,マイクロ波伝送ラインの空洞を使用しました.
  • 量子ビットに量子トモグラフィーを施し,光子を放出しました.

主要な成果:

  • 高い効率とスペクトルの純度を持つオンチップ,オンデマンドの単光子源を実証しました.
  • 量子ビットから放射される光子への量子相と振幅の移転を確認しました.
  • フォトン源の平均電力と電圧を特徴づけた.

結論:

  • 開発された単光子源は,チップ上の量子光学の重要な進歩です.
  • この技術は,集積回路内の量子通信を容易にする.
  • 量子コンピュータとネットワークを構築するためのツールキットが増えるのに寄与しています.