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Photoelectric Effect

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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Updated: Jun 23, 2026

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

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

Published on: May 30, 2014

単光子装置から区別できない光子.

Charles Santori¹, David Fattal, Jelena Vucković

¹Quantum Entanglement Project, ICORP, JST, E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4088, USA. chars@stanford.edu

|October 11, 2002

まとめ

この要約は機械生成です。

マイクロキャビティ内の半導体量子ドットは,区別がつかない単一の光子を生成することができます. このブレークスルーは,量子情報技術と量子光学実験の進歩に不可欠です.

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関連する実験動画

Last Updated: Jun 23, 2026

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

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

Published on: May 30, 2014

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

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

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.
量子情報科学とは,量子情報科学である.
半導体物理学半導体物理学

背景:

単光子源は,量子情報処理に不可欠である.
既存の光源は,フォトンの区別がつかないことが困難になり,線形光学量子計算のようなアプリケーションを制限しています.
半導体量子ドットは,決定的単光子生成のための有望なプラットフォームを提供します.

研究の目的:

半導体量子ドットから放射される光子の不可分性を微小穴の量子ドットで調査する.
同様の光子波パケットを必要とする量子情報アプリケーションにこれらのソースの適性を評価する.

主な方法:

マイクロキャビティ構造に埋め込まれた半導体量子ドットを使用しました.
フォトンの不可分性を測定するために,Hong-Ou-Mandelタイプの2フォトンの干渉実験を行った.
連続して放射される光子間の波束の重なりを定量化した.

主要な成果:

半導体量子ドットソースからほとんど区別できない光子を実証した.
0.81.8 の高平均波パケット重複を達成しました.
プアソニアン源とは異なり,源は同じパルスで複数の光子を滅多に放出しないことが確認されました.

結論:

マイクロキャビティ内の半導体量子ドットは,区別がつかない単一の光子の有効な源を提供します.
区別がつかない高度のこの源は,量子光学と量子情報アプリケーションにとって非常に価値があります.
この研究は,将来の量子技術のための堅牢な単光子源の開発を進めています.