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Updated: Jul 10, 2026

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Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
ダイヤモンドの個々の電子と核スピン量子ビットに基づく量子レジスタ.
M V Gurudev Dutt1, L Childress, L Jiang
1Department of Physics, Harvard University, Cambridge, MA 02138, USA.
まとめ
研究者は,室温のダイヤモンドの電子と核スピンを用いて制御可能な量子レジスタを作成しました. このブレークスルーにより,長いコヒーレンス時間を持つスケーラブルな量子情報システムが可能になりました.
科学分野:
- 量子情報科学とは,量子情報科学である.
- 凝縮物質物理学 凝縮物質物理学
- 量子コンピューティング
背景:
- 長い相関時間を持つ孤立した量子システムを特定することは,量子情報科学にとって極めて重要です.
- 量子システムのスケーラブルな操作と結合は,依然として重要な課題です.
研究 の 目的:
- 量子情報処理のためのダイヤモンドの電子と核スピンの一貫した操作を実証する.
- 窒素空白 (NV) カラーセンターを使用して制御可能な量子レジスタを作成します.
- 拡張可能で,光学的に結合された量子情報システムの可能性を評価する.
主な方法:
- NVセンターにおける電子スピンの一貫した制御のために,光学およびマイクロ波放射線を活用した.
- 電子と核スピン量子ビットの強固な初期化を実装しました.
- 室温で電子と核のスピン間の量子状態移転を証明した.
主要な成果:
- 堅牢な初期化と電子と核スピン量子ビット間の任意の量子状態移転を達成しました.
- 光学操作中に電子スピンから核スピンクビットを効果的に分離することが実証された.
- 個々の核スピン量子ビット間の一貫した相互作用が観察され,優れた一貫性特性を示した.
結論:
- ダイヤモンドの電子と核のスピンを基に制御可能な量子レジスタを開発した.
- 拡張可能な量子情報システムのためのNVセンターの可能性を検証した.
- 室温での動作と実証されたコヒーレンス特性により,実用的な量子技術への道が開けています.
関連する概念動画
Atomic Structure
All matter is composed of atoms, the smallest individual units of elements. Each atom is made up of three subatomic particles: protons, neutrons, and electrons. Together, these three particles account for the mass and the charge of an atom.The History of Atomic TheoryThe first person to propose that everything on Earth is made up of tiny particles was the Greek philosopher Democritus, around 450 B.C. He used the term atomos, Greek for “indivisible,” from which the modern term “atom” is derived.
Subatomic Particles
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
Atomic Radii and Effective Nuclear Charge
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
Nuclear Stability
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together in the...
To hold positively charged protons together in the...
Electronic Structure of Atoms
An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers: n, l, ml, and...
Atomic Structure
The Greek philosopher Democritus proposed that everything on Earth is made up of tiny particles called atomos, Greek for "indivisible," from which the modern term "atom" is derived. In the 19th century, John Dalton proposed the atomic theory that is still largely correct today. He put forth five postulates to explain how atoms made up the world around us. (1) All matter is composed of infinitely small particles or atoms. (2) All atoms of a given element are identical to one another and (3) are...

