2原子の絡み合いの実験的な浄化
R Reichle1, D Leibfried, E Knill
1National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Nature
|October 20, 2006
まとめ
研究者らは,効率的で破壊的でない量子絡み合いの浄化プロトコルを開発した. この方法は,原子量子ビットを使用して,高信頼性の絡み合ったペアを蒸留し,量子情報処理能力を改善します.
科学分野:
- 量子情報科学とは,量子情報科学である.
- 量子コンピューティング
- 量子コミュニケーションとは
背景:
- 絡み合いは,プライベート通信や量子テレポーテーションなどの量子アプリケーションに不可欠です.
- 絡み合った粒子を運ぶことは,デコエレンスによる絡み合いの忠誠度を低下させます.
- 既存の絡み合いの浄化プロトコルは,しばしば非効率で破壊的です.
研究 の 目的:
- 効率的で破壊的でない絡み合いの浄化プロトコルを開発する.
- 分布された絡み合った量子ビット (qubits) の忠誠度を向上させるため.
- 実践的な量子情報処理アプリケーションを可能にするために.
主な方法:
- 絡み合いの浄化のために利用された原子量子ビット (qubits).
- 量子操作と古典通信を分離したプロトコルを実装した.
- 2つの騒々しく絡み合ったペアを単一の高精度ペアに蒸留しました.
主要な成果:
- 効率的で破壊的でない絡み合いの浄化を達成しました.
- 得られた蒸留された絡み合ったペアは,成功確率は35%を超えています.
- 保証された蒸留ペアは,さらなる量子処理のために利用可能である.
結論:
- 開発されたプロトコルは,以前の方法よりも著しい進歩をもたらしています.
- 効率的で破壊的でない絡み合いの浄化は,今や原子量子ビットで実現可能である.
- この技術は,量子通信とコンピューティングの進歩に不可欠です.
関連する概念動画
Radioactivity and Nuclear Equations
18.3K
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for hydrogen, neutrons. The number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element.
A nuclide of an element has a specific number of protons and...
A nuclide of an element has a specific number of protons and...
18.3K
Types of Radioactivity
16.2K
The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
16.2K
Nuclear Transmutation
12.9K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
12.9K
¹³C NMR: ¹H–¹³C Decoupling
1.7K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.7K
Atomic Absorption Spectroscopy: Atomization Methods
1.8K
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
1.8K
Double Resonance Techniques: Overview
870
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
870


