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関連する概念動画

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

41.8K
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.
41.8K
Quantum Numbers02:43

Quantum Numbers

34.2K
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.
34.2K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

31.6K
sp3d and sp3d 2 Hybridization
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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

940
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
940
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

46.2K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
46.2K
Free Energy Changes for Nonstandard States03:25

Free Energy Changes for Nonstandard States

10.8K
The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
 
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
10.8K

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関連する実験動画

Updated: May 25, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

14.4K

結合ボゾン量子ビットによるハードウェア効率のよい量子エラー修正

Harald Putterman1, Kyungjoo Noh2, Connor T Hann2

  • 1AWS Center for Quantum Computing, Pasadena, CA, USA. putterma@amazon.com.

Nature
|February 26, 2025
PubMed
まとめ
この要約は機械生成です。

研究者は連鎖ボゾンコードを使って ハードウェア効率の良い量子エラー修正方法を開発しました このアプローチは論理量子ビットのエラーを大幅に削減し, 容認性量子計算の道を開きます.

さらに関連する動画

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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

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関連する実験動画

Last Updated: May 25, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

14.4K
Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

8.9K
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

9.5K

科学分野:

  • 量子コンピューティング
  • 量子エラーの修正
  • 超伝導回路

背景:

  • 量子コンピュータは実用的な応用のために量子エラーの修正を必要とするが,現在の方法は高物理量子ビットのオーバーヘッドがある.
  • 量子コンピューティングを拡大するには ハードウェア効率の良いアプローチが不可欠です

研究 の 目的:

  • ハードウェアの効率を向上させるため,連鎖ボゾンコードを使用して論理量子ビットメモリを実現します.
  • この新しいエラー修正戦略の性能とスケーリングを調査する.

主な方法:

  • 超伝導量子回路を利用して,外側の繰り返しのコード (距離d=5) を有する連鎖ボゾンキャット量子ビットを実装した.
  • ビットフリップに対する受動的保護とフェーズフリップ補正のためのアンチラトランスモンを採用した.
  • ロジカルビットフリップエラーを抑制するキャットトランスモンのノイズバイアスCXゲートを実証した.

主要な成果:

  • 論理量子ビットのメモリをフェーズフリップで 誤差値以下で動作する 繰り返しコードで達成した.
  • 論理的なビットフリップの誤差を抑制し,キャット量子ビットの平均フォトン数を増加させた.
  • 測定された最小ロジカルエラー率は,距離-3で1.75%で,距離-5で1.65%です.

結論:

  • 結合されたボゾンコードは 容認性量子コンピューティングへの ハードウェア効率の良い経路を提供します
  • ボゾンコードの固有のエラー抑制は,効率的な外部エラー修正コードを使用する鍵です.
  • このアプローチはスケーラブルで 堅牢な量子コンピュータの構築に 有望です