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関連する概念動画

Non-gated Ion Channels01:24

Non-gated Ion Channels

8.3K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
8.3K
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

7.8K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
7.8K
Ligand-gated Ion Channels01:19

Ligand-gated Ion Channels

14.4K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
14.4K
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

11.0K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
11.0K
Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

4.1K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
4.1K
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

5.8K
GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
5.8K

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関連する実験動画

Updated: Feb 13, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.3K

素早い量子論理ゲートとトラップされたイオン量子ビット

V M Schäfer1, C J Ballance1, K Thirumalai1

  • 1Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK.

Nature
|March 2, 2018
PubMed
まとめ
この要約は機械生成です。

研究者たちは 捕まったイオンを使って 素早い量子ロジックの 新しい方法を開発しました この技術は 絡み合いの生成を大幅に加速し 高精度とエラーに対する頑丈性を達成し 先進的な量子コンピュータへの道を切り開きます

さらに関連する動画

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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関連する実験動画

Last Updated: Feb 13, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

15.3K
Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

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科学分野:

  • 量子情報科学
  • 原子物理学
  • 量子コンピュータ ハードウェア

背景:

  • 閉じ込められた原子イオンは 長いコヒーレンス時間と高信頼性の操作により 量子コンピューティングの主要なプラットフォームです
  • 閉じ込められたイオンで量子エンタグレメントを生成するための現在の2キビットゲートは,アディアバティック操作要件のために10kHzの速度に制限されています.
  • より速いゲート操作は 量子コンピュータのスケールアップと 脱合性を克服するために不可欠です

研究 の 目的:

  • 捕らわれたイオンシステムで高速で高信頼性の2キビットゲートを実現するための新しい方法を実装します.
  • 従来のアディアバティック限界を大幅に上回る速度で絡み合いの生成を証明する.
  • 実験的なノイズ,特に光学的相変動に対する量子論理操作の堅実性を高める.

主な方法:

  • 特定の軌道に沿って離子運動を正確に制御するために,振幅の形状のレーザーパルスを使用します.
  • 誘導レーザーパルスの光学相に対して無感性を備えたゲート操作.
  • 単一の振幅形パルスと ゲート実行のための連続波レーザービームのペアを実装した.

主要な成果:

  • メガヘルツ速度の量子ロジックを実現し 480ナノ秒で 絡み合いの生成を可能にしました
  • 標準的な方法より10倍以上の誤差率で 99.8%の精度で 1.6ミクロ秒のゲートを示した.
  • この方法は,高精度を維持しながら,レーザーの強度を増したより速いゲートの可能性を示しています.

結論:

  • 開発された技術は,トラップされたイオン量子ビットのサブマイクロ秒量子論理速度への経路を提供します.
  • このアプローチは,閉じ込められたイオン (一貫性,忠誠度) の強みを,固体系で通常見られる速度と組み合わせている.
  • この方法は,スケーラブルで故障を許容する量子コンピュータの開発を加速させることを約束しています.